Vasa (previouslyWasa) (Swedish pronunciation:[²vɑːsa]ⓘ) is a Swedishwarship built between 1626 and 1628. The ship sank after sailing roughly 1,300 m (1,400 yd) into her maiden voyage on 10 August 1628. She fell into obscurity after most of her valuablebronzecannons were salvaged in the 17th century, until she was located again in the late 1950s in a busy shipping area inStockholm harbor. The ship was salvaged with a largely intact hull in 1961. She was housed in a temporary museum called Wasavarvet ("The Vasa Shipyard") until 1988 and then moved permanently to theVasa Museum in theRoyal National City Park in Stockholm. Between her recovery in 1961 and the beginning of 2025,Vasa has been seen by over 45 million visitors.[2]
The ship was built on the orders of the King of SwedenGustavus Adolphus as part of the military expansion he initiated in a war withPoland-Lithuania (1621–1629). It was constructed at the navy yard in Stockholm under a contract with private entrepreneurs in 1626–1627 and armed primarily with bronze cannons cast in Stockholm specifically for the ship. Richly decorated as a symbol of the king's ambitions for Sweden and himself, upon completion she was one of the most powerfully armed vessels in the world. However,Vasa was dangerously unstable, with too much weight in the upper structure of the hull. Despite this lack of stability, she was ordered to sea and sank only a few minutes after encountering a wind stronger than a breeze.
The order to sail was the result of a combination of factors. The king, who was leading the army in Poland at the time of her maiden voyage, was impatient to see her take up her station asflagship of the reserve squadron atÄlvsnabben in theStockholm Archipelago. At the same time the king's subordinates lacked the political courage to openly discuss the ship's problems or to have the maiden voyage postponed. An inquiry was organized by theSwedish Privy Council to find those responsible for the disaster, but in the end no one was punished.
During the 1961 recovery, thousands of artifacts and the remains of at least 15 people were found in and aroundVasa's hull bymarine archaeologists. Among the many items found were clothing, weapons, cannons, tools, coins, cutlery, food, drink and six of the ten sails. The artifacts and the ship herself have provided scholars with invaluable insights into details of naval warfare, shipbuilding techniques, the evolution of sailing rigs, and everyday life in early 17th-century Sweden. TodayVasa is the world's best-preserved 17th-century ship, answering many questions about the design and operation of ships of this period. The wreck ofVasa continually undergoes monitoring and further research on how to preserve her.[3]
A map of Sweden's territorial gains and losses 1560–1815. In the years thatVasa was built and sank, Sweden still had not seized the southernmost of its present provinces, but possessed almost all of modern-dayFinland andEstonia as well asIngria andKarelia.
During the 17th century, Sweden went from being a sparsely populated, poor, and peripheral northern European kingdom of little influence to one of themajor powers in continental politics. Between 1611 and 1718 it was the dominant power in theBaltic, eventually gaining territory that encompassed the Baltic on all sides. This rise to prominence in international affairs and increase in military prowess, calledstormaktstiden ("age of greatness" or "great power period"), was made possible by a succession of able monarchs and the establishment of a powerful centralized government, supporting a highly efficient military organization. Swedish historians have described this as one of the more extreme examples of an early modern state using almost all of its available resources to wage war; the small northern kingdom transformed itself into afiscal-military state and one of the most militarized states in history.[4][5]
Gustavus Adolphus (1594–1632) has been considered one of the most successful Swedish kings in terms of success in warfare. WhenVasa was built, he had been in power for more than a decade. Sweden was embroiled in awar with Poland-Lithuania, and looked apprehensively at the development of theThirty Years' War in present-day Germany. The war had been raging since 1618 and from aProtestant perspective it was not successful. The king's plans for a Polish campaign and for securing Sweden's interests required a strong naval presence in the Baltic.[6]
TheSwedish Navy suffered several severe setbacks during the 1620s. In 1625, a squadron cruising in theBay of Riga was caught in a storm and ten ships ran aground and were wrecked. In theBattle of Oliwa in 1627, a Swedish squadron was outmaneuvered and defeated by a Polish force and two large ships were lost.Tigern ("The Tiger"), which was the Swedish admiral's flagship, was captured by the Poles, andSolen ("The Sun") was blown up by her own crew when she was boarded and nearly captured. In 1628, three more large ships were lost in less than a month. AdmiralKlas Fleming's flagshipKristina was wrecked in a storm in theGulf of Danzig,Riksnyckeln ("Key of the Realm") ran aground at Viksten in the southern archipelago of Stockholm andVasa foundered on her maiden voyage.[7][8]
Gustavus Adolphus was engaged in naval warfare on several fronts, which further exacerbated the difficulties of the navy. In addition to battling the Polish navy, the Swedes were indirectly threatened by Imperial forces that had invadedJutland. The Swedish king had little sympathy for the Danish king,Christian IV, and Denmark and Sweden had been bitter enemies for well over a century. However, Sweden feared a Catholic conquest ofCopenhagen andZealand. This would have granted the Catholic powers control over the strategic passages between theBaltic Sea and theNorth Sea, which would be disastrous for Swedish interests.[9][8]
Until the early 17th century, the Swedish navy was composed primarily of small to medium-sized ships with a single gundeck, normally armed with12-pounder and smaller guns; these ships were cheaper than larger ships and were well-suited for escort and patrol. They also suited the prevailing tactical thinking within the navy, which emphasized boarding as the decisive moment in a naval battle rather than gunnery. The king, who was a keen artillerist, saw the potential of ships as gun platforms, and large, heavily armed ships made a more dramatic statement in the political theater of naval power. Beginning withVasa, he ordered a series of ships with two full gundecks, outfitted with much heavier guns.[10]
Four such ships were built afterVasa:Äpplet ("The Apple"[a]),Kronan ("The Crown"),Scepter andGöta Ark (literally "Ark of Götaland"), before the Privy Council cancelled the orders for the others after the king's death in 1632. These ships, especiallyKronan andScepter, were much more successful, took part in battles,[11] and served as flagships in the Swedish navy until the 1660s. The second of the so-calledregalskepp (usually translated as "royal ships"),[b]Äpplet was completed in 1629 and is regarded as a sister ship ofVasa. The only significant difference between the two was an increase in the width ofÄpplet by about a meter (3.1 ft).[13][14] The wreck ofÄpplet, visibly very similar toVasa, was found in December 2021.Äpplet, and other ships, are believed ultimately to have been decommissioned and sunk as underwater barriers against enemy ships.[11]
The nameVasa is not written anywhere on the ship. Where we would expect to see this on a modern ship (the stern) is a substantial carving of thecoat of arms of theHouse of Vasa. The centralheraldic symbol of that is the "vase" which, at the time the ship was built, denoted asheaf of wheat (or wheatsheaf). It is this main heraldic element that gives the ship her name.[15]
In contemporary documents, the name was most often spelt as "Wasen" or "Wasan". Swedish spelling was rationalised early in the 20th century and one of these changes was the substitution of the "W" with a "V". The pronunciation is unchanged. In Swedish, the definite article is the suffix "-(e)n" or "-(e)t", depending on grammatical gender of the noun: "the Vasa". The decision of theVasamuseet was to follow the usage for warship names in English, which is to have no definite article.[16][17]
Just beforeVasa was ordered, Dutch-bornHenrik Hybertsson ("Master Henrik") was shipwright at the Stockholm shipyard. On 16 January 1625, Master Henrik and business partner Arendt de Groote signed a contract to build four ships, two with akeel of around 135 feet (41 m) and two smaller ones of 108 feet (33 m).[19]
Master Henrik and Arendt de Groote began buying the raw materials needed for the first ships in 1625, purchasing timber from individual estates in Sweden as well as buying rough-sawn planking inRiga, Königsberg (modernKaliningrad), andAmsterdam. As they prepared to begin the first of the new ships in the autumn of 1625, Henrik corresponded with the king through Vice Admiral Klas Fleming about which ship to build first. The loss of ten ships in the Bay of Riga led the king to propose building two ships of a new, medium size as a quick compromise, and he sent a specification for this, a ship which would be 120 feet (37 m) long on the keel. Henrik declined, since he had already cut the timber for a large and a small ship. He laid the keel for a larger ship in late February or early March 1626.[20] Master Henrik never saw Vasa completed; he fell ill in late 1625, and by the summer of 1626 he had handed over supervision of the work in the yard to another Dutch shipwright,Henrik "Hein" Jacobsson. He died in the spring of 1627, probably about the same time as the ship was launched.[21]After launching, work continued on finishing the upper deck, the sterncastle, thebeakhead and the rigging. Sweden had still not developed a sizeable sailcloth industry, and material had to be ordered from abroad. In the contract for the maintenance of rigging, French sailcloth was specified, but the cloth for the sails ofVasa most likely came from Holland.[22] The sails were made mostly ofhemp and partly offlax. The rigging was made entirely of hemp imported fromLatvia through Riga. The king visited the shipyard in January 1628 and made what was probably his only visit aboard the ship.[23]
A model showing a cross section ofVasa's hull, illustrating the shallowhold and twogundecks
In the summer of 1628, the captain responsible for supervising construction of the ship, Söfring Hansson, arranged for the ship's stability to be demonstrated for Vice Admiral Fleming, who had recently arrived in Stockholm from Prussia. Thirty men ran back and forth across the upper deck to start the ship rolling, but the admiral stopped the test after they had made only three trips, as he feared the ship would capsize. According to testimony by the ship's master, Göran Mattson, Fleming remarked that he wished the king were at home. Gustavus Adolphus had been sending a steady stream of letters insisting that the ship be put to sea as soon as possible.[24]
There has been much speculation about whetherVasa was lengthened during construction and whether an additional gundeck was added late during the build. There is no evidence thatVasa was substantially modified after the keel was laid. Ships contemporary toVasa that were elongated were cut in half and new timbers spliced between the existing sections, making the addition readily identifiable, but no such addition can be identified in the hull, nor is there any evidence for any late additions of a second gundeck.[25]
The king ordered seventy-two24-pound guns for the ship on 5 August 1626, and this was too many to fit on a single gundeck. Since the king's order was issued less than five months after construction started, it would have come early enough for the second deck to be included in the design. The FrenchGalion du Guise, the ship used as a model forVasa, according to Arendt de Groote, also had two gundecks.[25]Laser measurements ofVasa's structure conducted in 2007–2011 confirmed that no major changes were implemented during construction, but that thecentre of gravity was too high.[26]
There was some vacillation over the exact armament forVasa whilst she was being built. One issue was trying to source enough guns to meet the specification. The major options were a lower gun-deck battery of 24-pounders, with the upper gun-deck being 12-pounders – versus having just 24-pounders on both the gun-decks.Vasa was actually built with upper gun-deck ports sized for the smaller 12-pounders. The final decision, though, was a total of 56 24-pounders distributed over the two gun-decks. Not all of these guns had been delivered by the time she sailed; some gun carriages remained empty.[27]
Vasa was an early example of a warship with two full-length gundecks, and was built when the theoretical principles of shipbuilding were still poorly understood. Two gundecks was a much more complicated compromise between seaworthiness and firepower than a single gundeck. The overall weight distribution, particularly the hull itself, was too top-heavy. This underlying fault was not possible to correct by adding more ballast, and might have required a major redesign to correct. Safety margins during the 17th century were also far below anything that would be acceptable today. Combined with the fact that 17th-century warships were built with intentionally high superstructures, used as firing platforms, this madeVasa a risky undertaking.[28]
The inside of the lower gundeck looking toward the bow. The interior of the ship does not contain any guns or any of the original contents and is currently fitted with modern lighting and other safety features.
Vasa was built during a time of transition in naval tactics, from an era when boarding was still one of the primary ways of fighting enemy ships to an era of the strictly organizedship-of-the-line and a focus on victory through superior gunnery.Vasa was armed with powerful guns and built with a high stern, which would act as a firing platform in boarding actions for some of the 300 soldiers she was supposed to carry, but the high-sided hull and narrow upper deck were not optimized for boarding.[29] She was neither the largest ship ever built, nor the one carrying the greatest number of guns. What made her arguably the most powerful warship of the time was the combined weight of shot that could be fired from the cannons of one side: 588 pounds (267 kg), excludingstormstycken, guns used for firing anti-personnel ammunition instead of solid shot. This was the largest concentration of artillery in a single warship in the Baltic at the time, perhaps in all of northern Europe, and it was not until the 1630s that a ship with more firepower was built. This large amount of naval artillery was placed on a ship that was quite small relative to the armament carried. By comparison,USS Constitution, a frigate built by the United States 169 years afterVasa, had roughly the same firepower, but was over 700tonnes (690long tons; 770short tons) heavier.[30]
TheConstitution, however, belonged to a later era of naval warfare that employed theline of battle tactic, where ships fought in a line of ships (orline ahead) attempting to present the batteries of one side of each ship toward the enemy. The guns would be aimed in the same direction, and fire could be concentrated on a single target. In the 17th century, tactics involving organized formations of large fleets had still not been developed. Rather, ships would fight individually or in small improvised groups, and focused on boarding.Vasa, though possessing a formidable battery, was built with these tactics in mind, and therefore lacked a unifiedbroadside with guns that were all aimed in roughly the same direction. Rather, the guns were intended to be fired independently and were arranged according to the curvature of the hull, so that the ship bristled with artillery in all directions, covering virtually all angles. The guns facing aft, thestern chasers, were still not on board when the ship sank, however.[31]
Naval gunnery in the 17th century was still in its infancy. Guns were expensive and had a much longer lifespan than any warship. Guns with a lifetime of over a century were not unheard of, while most warships would be used for only 15 to 20 years. In Sweden and many other European countries, a ship would normally not "own" her guns, but would be issued armament from the armory for every campaign season. Ships were therefore usually fitted with guns of very diverse age and size. What allowedVasa to carry so much firepower was not merely that an unusually large number of guns were crammed into a relatively small ship, but also that the 46 main 24-pounder guns were of a new and standardized lightweight design. These were cast in a single series at the state gun foundry in Stockholm, under the direction of the Swiss-born founder Medardus Gessus. Two additional 24-pounders, of a heavier and older design, were mounted in the bows asbow chasers. Four more heavy guns were intended for the stern, but the cannon foundry could not cast guns as fast as the navy yard could build ships, andVasa waited nearly a year after construction was finished for her armament. When the ship sailed in August 1628, eight of the planned armament of 72 guns had still not been delivered. All cannons during this time had to be made from individually made moulds that could not be reused, butVasa's guns had such uniform precision in their manufacturing that their primary dimensions varied by only a few millimeters, and their bores were almost exactly 146 mm (5.7 in). The remaining armament ofVasa consisted of eight 3-pounders, six large-caliberstormstycken (similar to what the English calledhowitzers) for use during boarding actions, and two 1-poundfalconets. Also included on board were 894 kilograms (1,971 pounds) ofgunpowder and over 1,000 shot of various types for the guns.[32]
The gundecks ofVasa are not parallel to the waterline, but follow the naturalsheerline of the hull; this curve can be clearly seen in some of the photographs taken inside the ship. By the middle of the 17th century, warships had the gundeck set parallel to the waterline.Vasa's arrangement avoids any of the gunports having to be cut through the structuralwales, which also follow this curve. The later layout means that the lower gundeck gunports are a consistent amount above the waterline, avoiding the weight of guns and structure of that deck towards the bow and stern being unnecessarily high.[33]
Generally, masts, sails and rigging, if not lost in the original wrecking event, are much more exposed to contemporary salvage, degradation or loss than the lower hull components that usually make up the remains of wrecks. WithVasa, virtually all of the lower fore and main masts have survived, much of the bowsprit and twoyards which are likely derived from the ship. To this are added the six sails (out of a complement of ten) that were not set on the maiden voyage, but stored below in the sailroom, the 412 gun tackle and rigging blocks (plus 143 pieces) recovered out of a possible outfit of about 600, the deadeyes used to adjust the tension in the shrouds, of which 125 were recovered,parrel ribs and trucks, and ropes. By comparison, theRed Bay wreck 24M (sunk, probably, 1565) yielded 48 standing blocks (equivalent to deadeyes) and 24 running blocks[34] whilst theMary Rose (sunk 1545) produced only blocks that were stored below decks – and the recovered sail has yet to be investigated.[35] Neither of these had surviving masts, with their size only being estimated from the dimensions of themast partners and steps.Vasa's sailing rig finds easily outnumber the aggregate total of finds from these two wrecks plus those fromLa Belle (sunk 1686) andSanto Antonio de Tanna (sunk 1697).[36][37]
A 1:10 rigged model ofVasa Sails: (1) spritsail topsail; (2) spritsail; (3) fore course; (4) fore topsail; (5) fore topgallant sail; (6) main course; (7) main topsail; (8) main topgallant sail; (9) mizzen; (10) mizzen topsail. Masts and spars: (a) spritsail topmast; (b) bowsprit; (c) foremast; (d) fore topmast; (e) fore topgallant mast; (f) mainmast; (g) main topmast; (h) main topgallant mast; (i) mizzenmast; (j) mizzen topmast.
Vasa had threemasts: a foremast towards the bow of the ship, a mainmast near the middle and a mizzen mast towards the aft of the ship. The fore- and mainmasts were built in three sections: a lower mast that was stepped on the stem and keel at the bottom of the ship's hull and passed through each of the decks; a topmast that was attached to the lower section; and atopgallant mast at the top. The topmasts and topgallants were salvaged soon after the sinking, while most of the lower sections of the main and foremasts largely survived to be salvaged in modern times. The mizzen mast consisted of only two sections: a mizzen, which was stepped on the upper gundeck, followed by a mizzen topmast.[38] Thebowsprit was stepped against the front of the lower foremast through the bowsprit bitts, a heavy timber frame located on the upper gundeck. The bowsprit served as a point of attachment for several of the major stays that held up much of the standing rig. At the outer end of the bowsprit there was a spritsail topmast with a mast head to carry a flagstaff.[39]
The lower foremast was made from a singlepine tree with additional material to make thecheeks and thehounds that were used to attach thestays.[40] The lower mainmast was assembled as a "made mast" from a number of pieces of timber that reinforced a central core, rather than from a single tree.[41] A single-tree mast was the preferred choice at the time and was much stronger structurally. The shipyard in Stockholm had at least indirect access to timber from western Sweden at the time. "Gothenburg masts" were considered among the best in Europe, but this source was not fully utilized by the Swedish navy until later in the 17th century. The made mast used forVasa was most likely supplied by Amsterdam-based merchants[42] who dominated the European timber market at the time.[43]
WhenVasa sank, she only had four of her complement of ten sails bent onto the yards. The others were below deck in the sail room, neatly folded, tied and coiled, and placed in two large heaps. The weight of this mound of canvas presented problems to the excavators, but it probably contributed substantially to the survival of the sail cloth, which fared better towards the centre of the heaps. The larger heap had to be carefully cut into two pieces so that it could be manoeuvred out of the sail room.[c][44]
The recovered sails consisted of thespritsail, spritsail topsail, foretopgallant, maincourse, main topgallant and the mizzentopsail. There was also abonnet for the mizzen and a set of sails for aship's boat (astaysail and a mainsail[d]).[45]The sails are of relatively light construction when compared to those of ships from later times. This fits with the Swedish navy in the 1620s operating generally only in the summer months when strong winds would not be expected. Two weights of canvas are used. The main course, mizzen bonnet and spritsail used the heavier one, which consisted of plain wovenhemp. The lighter type of canvas was made of a mixture offlax and hemp, and used on the other recovered sails. Hemp is the stronger of the two fibres used.[46]
A painting of the same date asVasa, showing the "half-masting" of the topsails as a response to stronger winds
Square sails of ships from the time ofVasa were notreefed to reduce the amount of sail area in strong winds. An extra piece of sail, called a bonnet was instead fastened to the foot (lower edge) of the fore course in lighter winds.[e] In stronger winds, instead of reefing, the bonnet was removed. Another action in stronger winds was to "half mast" the topsails. This involved partially lowering the topsails, which reduced the amount of drive they produced. With the sail lower down the topmast, the forces generated were lower down the mast, so putting less tension in the backstays.[f] In contrast, the ship's boat sails recovered from the sail room carried reef points and reefingcringles that would be familiar to any modern sailor of a traditionally rigged small boat. The reef points consist of short lengths of rope that pass through the fabric of the sail, with the rope locally unlaid so that it can be sewn to the surface of the sail. The reef points are used to tie up the unused part of the sail when the reefing cringles become the tack and clew of the reefed sail. This is the earliest known archaeological example of reef points.[g][50]
The fore starboard chainwale on Vasa. The chainwale is the thick plank on the outside of the hull with its edge against the hull. The deadeyes of the shrouds are above the chainwale and the chains that transfer the load in the shrouds to the hull are underneath.
Thechainwales onVasa are positioned above the gunports for the upper gundeck. This was the typical Dutch arrangement for a ship with two decks until the 1620s. Thereafter, Dutch shipyards used a lower attachment point, between the two rows of gunports, as was already done in other European shipyards.[51]
The alignment of the chains that pass over the chainwales can be detected in the marks left in the wood (even though the iron components have corroded away). These alignments can be extrapolated to follow the route of eachshroud to the top of each lower mast, but with one exception at each chainwale. This non-conforming position would be suitable for a topmastbackstay. This extra rigging component had recently been introduced in European shipyards, with the earliest known instance in 1611. Giving greater support to the topmast with a backstay allowed the topsail to take a role as the main working sail on each mast. Assquare rig evolved, the topsail became the first square sail to be set and the last to be furled. Before this change, thecourse was the first sail to be set and the last to be taken in, with topsails simply providing extra sail area in lighter winds.[52] This is a substantial change in sail-handling technique.[h] The sails set onVasa at the time of her loss conform with this interpretation of the chainwales – thatVasa was preferentially using topsails over courses.[54]Vasa also has the main topsail halyard knighthead[i] positioned a distance aft of the foot of the mast and angled to point at the main-topmast head. This gives further support to the main topmast, with the halyard having a secondary role as a backstay.[56]
A double block recovered fromVasa. It is made entirely ofash for both the shell and the sheaves. Though it is not visible in this picture, this example had the less common wrought iron strop to attach it to a fixed surface or the object being moved.[57]
Blocks, or pulleys, are a means of redirecting the path of a rope or providing a mechanical advantage, either on its own or in combination with other blocks, to increase the force applied. The majority of blocks have a sheave which rotates on an axle – the rope that goes through the block fits into a groove cut in the sheave. The load in the rope is transferred from the axle to the shell of the block, which, at the time ofVasa, has a rope strop (usually) or wrought iron strap which goes around the shell and is used to fasten the block to another object. More rarely, a block does not have a sheave. It is then termed a "dead block".[58]
Deadeyes are used in the standing rigging. These are the pieces of wood that, operating in pairs, allow adjustment of the length of shrouds or stays. A lanyard passes through a number of holes in each pair – tightening the lanyard shortens the distance between the pair of deadeyes. Since natural fibre ropes can change in length depending on the amount of moisture in them, the standing rigging of a 17th-century ship needed much more adjustment than a more modern sailing vessel.[59]
The whipstaff in the steerage compartment ofVasa. The photograph is taken from the port side. The opening which provided some view of the sails is in the upper left of the picture.
Vasa was steered with awhipstaff (as opposed to a wheel, which started to be used in the next century). This is a vertical lever that passes through a sliding bearing in the deck (the "rowle") and operates on the end of the helm (ortiller), which in turn is attached to the top of therudder. The steering position (the "steerage") is immediately in front of the entrance to the great cabin, on the upper gundeck. It occupies a double-height space, with 3.24 metres (10.6 ft) of headroom to accommodate the length of the whipstaff. There are balustraded openings through which the helmsman has some view of the sails. The addition of a step across the width of the steerage suggests that this visibility had not turned out as planned and needed some last-minute adjustment. The helm is located a deck below, in the gunroom, which is the aftermost compartment on the lower gundeck. It passes through an opening in the stern to connect to the top of the rudder head.[60]
Vasa represents the only complete surviving and investigated example of a whipstaff steering system. Study of this has changed the presumptions of how effective this method was, as a number of replicas of ships have been built with a whipstaff, and the system has been found to be fully effective.[61]
In operation, the steering system of Vasa was able to apply 23 degrees of angle to the rudder. This is limited by the width of the hull structure where the helm moves from side to side in the gunroom. This angle is totally sufficient to steer the ship, as amounts greater than this create a lot of extra drag without increasing the turning moment significantly. At low angles, the whipstaff acts as a lever on the helm. At greater angles it works more as a push stick (rather like the tiller extension on a modern sailing dinghy).[62]
The steerage compartment was equipped with a bittacle, a wooden cabinet (made without any iron fastenings or components) which stood against the forward bulkhead on the centre-line. It has space for two compasses, one on each side of a central light. Each compass can be viewed through a glass window.[j] This allows the helmsman to see the course being steered whichever side of the whipstaff they are standing – this type of steering requires the operator to be much more mobile than with a steering wheel, so a single compass would be ineffective. Given the limited visibility from the steering position, the compasses and a view of some of the sails were the only means of staying on the course ordered from the con position on the deck above. The option of steering with reference to a distant landmark or another ship is not available.[64]
The whipstaff started to be replaced with wheel steering sometime in the 18th century, though the precise date of this changeover is unknown.[65]
The 1:10 museum model showing the richly decorated stern with miniature sculptures painted in what is believed to be the original color scheme.
As was the custom with warships at the time,Vasa was decorated with sculptures intended to glorify the authority, wisdom and martial prowess of the monarch and also to deride, taunt and intimidate the enemy. The sculptures made up a considerable part of the effort and cost of building the ship. The symbolism used in decorating the ship was mostly based on theRenaissance idealization of Roman and Greek antiquity, which had been imported from Italy through German and Dutch artists. Imagery borrowed from Mediterranean antiquity dominates the motifs, but also include figures from the Old Testament and even a few fromancient Egypt. Many of the figures are in Dutchgrotesque style, depicting fantastic and frightening creatures, including mermaids,wild men, sea monsters andtritons. The decoration inside the ship is much sparser and is largely confined to the steerage and the great cabin, at the after end of the upper gundeck.[66]
Residues of paint have been found on many sculptures and on other parts of the ship. The entire ornamentation was once painted in vivid colors. The sides of thebeakhead (the protruding structure below thebowsprit), the bulwarks (the protective railing around the weather deck), the roofs of thequarter galleries, and the background of the after upper works were all painted red, while the sculptures were decorated in bright colors, and the dazzling effect of these was in some places emphasized withgold leaf. Previously, it was believed that the background color had been blue and that all sculptures had been almost entirely gilded, and this is reflected in many paintings ofVasa from the 1970s to the early 1990s, such as the lively and dramatic drawings ofBjörn Landström or the painting by Francis Smitheman. In the late 1990s, this view was revised and the colors are properly reflected in more recent reproductions of the ship's decoration by maritime painterTim Thompson and the 1:10 scale model in the museum.Vasa is an example not so much of the heavily gilded sculptures of earlyBaroque art but rather "the last gasps of themedieval sculpture tradition" with its fondness for gaudy colors, in a style that today would be considered extravagant or even vulgar.[8][Example 1]
Full-scale, painted modern replicas of some of the ship's sculptures exhibited at theVasa Museum.
The sculptures are carved out ofoak,pine orlinden, and many of the larger pieces, like the huge 3-meter (9.8-foot) long figurehead lion, consist of several parts carved individually and fitted together with bolts. Close to 500 sculptures, most of which are concentrated on the high stern and its galleries and on the beakhead, are found on the ship.[67] The figure ofHercules appears as a pair of pendants, one younger and one older, on each side of the lower stern galleries; the pendants depict opposite aspects of the ancient hero, who was extremely popular during antiquity as well as in 17th-century European art. On the stern are biblical and nationalistic symbols and images. A particularly popular motif is the lion, which can be found asmascarons originally fitted on the insides of the gunport doors, grasping the royal coat of arms on either side, the figurehead, and even clinging to the top of the rudder. Each side of the beakhead originally had 20 figures (though only 19 have actually been found) that depictedRoman emperors fromTiberius toSeptimius Severus.[67]
Overall, almost all heroic and positive imagery is directly or indirectly identified with the king and was originally intended to glorify him as a wise and powerful ruler. The only actual portrait of the king is located at the very top of the stern. Here he is depicted as a young boy with long, flowing hair, being crowned by twogriffins representing the king's father,Charles IX.[k]
A recreation of the color pigments that were used by the naval shipyard where the ship was built; exhibit at theVasa Museum.
A team of at least six expert sculptors worked for a minimum of two years on the sculptures, most likely with the assistance of an unknown number of apprentices and assistants. No direct credit for any of the sculptures has been provided, but the distinct style of one of the most senior artists, Mårten Redtmer, is clearly identifiable. Other accomplished artists, like Hans Clausink, Johan Didrichson Tijsen (orThessen in Swedish) and possibly Marcus Ledens, are known to have been employed for extensive work at the naval yards at the timeVasa was built, but their respective styles are not distinct enough to associate them directly with any specific sculptures.[69]
The artistic quality of the sculptures varies considerably, and about four distinct styles can be identified. The only artist who has been positively associated with various sculptures is Mårten Redtmer, whose style has been described as "powerful, lively and naturalistic".[70] He was responsible for a considerable number of the sculptures. These include some of the most important and prestigious pieces: the figurehead lion, the royal coat of arms, and the sculpture of the king at the top of the stern. Two of the other styles are described as "elegant ... a little stereotyped and manneristic", and of a "heavy, leisurely but nevertheless rich and lively style", respectively. The fourth and last style, deemed clearly inferior to the other three, is described as "stiff and ungainly"[71] and was done by other carvers, perhaps even apprentices, of lesser skill.[72]
CentralStockholm and the movements ofVasa from Skeppsgården ('navy yard') to the anchoring place near the old royal castle where she was fitted and armed in the spring of 1628, and finally the location where she foundered and sank.
On 10 August 1628, Captain Söfring Hansson orderedVasa to depart on her maiden voyage to the naval station atÄlvsnabben. The day was calm, and the only wind was a light breeze from the southwest. The ship waswarped (hauled by anchor) along the eastern waterfront of the city to the southern side of the harbor, where four sails were set, and the ship made way to the east. The gun ports were open, and the guns were out to fire a salute as the ship left Stockholm.[24]
AsVasa passed under thelee of the bluffs to the south (now calledSödermalm), a gust of wind filled her sails, and sheheeled suddenly toport. Thesheets were cast off, and the ship slowlyrighted herself as the gust passed. AtTegelviken, where there is a gap in the bluffs, an even stronger gust again forced the ship onto her port side, this time pushing the open lower gunports under the surface, allowing water to rush in onto the lower gundeck. The water building up on the deck quickly exceeded the ship's minimal righting ability, and water continued to pour in until it ran down into the hold. The ship swiftly sank to a depth of 32 m (105 ft) only 120 m (390 ft) from shore. Survivors clung to debris or the upper masts, which were still above the surface. Many nearby boats rushed to their aid, but despite these efforts and the short distance to land, 30 people reportedly perished with the ship.Vasa sank in full view of a crowd of hundreds, if not thousands, of mostly ordinary Stockholmers who had come to see the ship set sail. The crowd included foreign ambassadors, in effect spies of Gustavus Adolphus' allies and enemies.[73]
The Council sent a letter to the king the day after the loss, telling him of the sinking, but it took over two weeks to reach him in Poland. "Imprudence and negligence" must have been the cause, he wrote angrily in his reply, demanding in no uncertain terms that the guilty parties be punished.[74] Captain Söfring Hansson, who survived the disaster, was immediately taken for questioning. Under initial interrogation, he swore that the guns had been properly secured and that the crew was sober.[74]
A full inquest before a tribunal of members of the Privy Council and Admiralty took place at theRoyal Palace on 5 September 1628. Each of the surviving officers was questioned as was the supervising shipwright and a number of expert witnesses. Also present at the inquest was the Admiral of the Realm,Carl Carlsson Gyllenhielm. The object of the inquest was as much or more to find a scapegoat as to find out why the ship had sunk. Whoever the committee might find guilty for the fiasco would face a severe penalty.[74]
Surviving crew members were questioned one by one about the handling of the ship at the time of the disaster. Was she rigged properly for the wind? Was the crew sober? Was the ballast properly stowed? Were the guns properly secured? However, no one was prepared to take the blame. Crewmen and contractors formed two camps; each tried to blame the other, and everyone swore he had done his duty without fault and it was during the inquest that the details of the stability demonstration were revealed.[75]
Next, attention was directed to the shipbuilders. "Why did you build the ship so narrow, so badly and without enough bottom that it capsized?" the prosecutor asked the shipwright Jacobsson.[76] Jacobsson stated that he built the ship as directed by Henrik Hybertsson (the original shipbuilder, recently deceased[22]), who in turn had followed the specification approved by the king. Jacobsson had in fact widened the ship by 1 foot 5 inches (43 cm) after taking over responsibility for the construction, but construction of the ship was too far advanced to allow further widening.[76]
In the end, no guilty party could be found. The answer Arendt de Groote gave when asked by the court why the ship sank was "Only God knows". Gustavus Adolphus had approved all measurements and armaments, and the ship was built according to the instructions and loaded with the number of guns specified. In the end, no one was punished or found guilty for negligence, and the blame effectively fell on the dead Henrik Hybertsson.[77]
An illustration from a treatise on salvaging from 1734, showing the traditional method of raising a wreck with the help ofanchors and ships orhulks aspontoons, basically the same method that was used to raiseVasa in the 20th century.
Less than three days after the disaster, a contract was signed for the ship to be raised. However, those efforts were unsuccessful.[78] The earliest attempts at raisingVasa by English engineer Ian Bulmer resulted in righting the ship but also got her more securely stuck in the mud, which was one of the biggest impediments to the earliest attempts at recovery.[78] Salvaging technology in the early 17th century was much more primitive than today, but the recovery of ships used roughly the same principles as were used to raiseVasa more than 300 years later. Two ships or hulks were placed parallel to either side above the wreck, and ropes attached to severalanchors were sent down and hooked to the ship. The two hulks were filled with as much water as was safe, the ropes tightened, and the water pumped out. The sunken ship then rose with the ships on the surface and could be towed to shallower waters. The process was then repeated until the entire ship was successfully raised above water level. Even if the underwater weight ofVasa was not great, the mud in which she had settled made her sit more securely on the bottom and required considerable lifting power to overcome.[79]
More than 30 years after the ship's sinking, in 1663–1665, Albreckt von Treileben and Andreas Peckell mounted an effort to recover the valuable guns. With a simplediving bell, the team of Swedish and Finnish divers retrieved more than 50 of them.[80] Such activity waned when it became clear that the ship could not be raised by the technology of the time. However,Vasa did not fall completely into obscurity after the recovery of the guns. The ship was mentioned in several histories of Sweden and the Swedish Navy, and the location of the wreck appeared on harbor charts of Stockholm in the 19th century. In 1844, the navy officer Anton Ludwig Fahnehjelm turned in a request for salvaging rights to the ship, claiming he had located her.[81] Fahnehjelm was an inventor who designed an early form of light diving suit and had previously been involved in other salvage operations. There were dives made on the wreck in 1895–1896, and a commercial salvage company applied for a permit to raise or salvage the wreck in 1920, but this was turned down. In 1999, a witness also claimed that his father, a petty officer in the Swedish navy, had taken part in diving exercises onVasa in the years before World War I.[82]
Two of the knightheads[i], posts fitted with the lowersheaves of heavytackles used for hoisting the yards. They are located on the weather deck, close to the mast.[83] The details of carved heads have been eroded almost beyond recognition by the currents ofStockholms ström.
In the 333 years thatVasa lay on the bottom of Stockholm harbor (calledStockholms ström, "the Stream", in Swedish), the ship and her contents were subject to several destructive forces, first among which were decomposition and erosion. Among the first things to decompose were the thousands of iron bolts that held thebeakhead and much of the sterncastle together, and this included all of the ship's wooden sculptures. Almost all of the iron on the ship rusted away within a few years of the sinking, and only large objects, such as anchors, or items made of cast iron, such as cannonballs, survived.[84]
Organic materials fared better in theanaerobic conditions, and so wood, cloth and leather are often in very good condition, but objects exposed to the currents were eroded by the sediment in the water, so that some are barely recognizable.[84] Objects which fell off the hull into the mud after the nails corroded through were well protected, so that many of the sculptures still retain areas of paint and gilding. Of the human remains, most of the soft tissue was consumed, leaving only the bones, which were often held together only by clothing, although in one case, hair, nails and brain tissue survived.[85]
The parts of the hull held together by joinery and wooden treenails remained intact for as much as two centuries, suffering gradual erosion of surfaces exposed to the water, unless they were disturbed by outside forces.Eventually the entire sterncastle, the high, aft portion of the ship that housed the officers' quarters and held up the transom, gradually collapsed into the mud with all the decorative sculptures. Thequarter galleries, which were merely nailed to the sides of the sterncastle, collapsed fairly quickly and were found lying almost directly below their original locations.[84]
Human activity was the most destructive factor, as the initial salvage efforts, the recovery of the guns, and the final salvage in the 20th century all left their marks. Peckell and Treileben broke up and removed much of the planking of the weather deck to get to the cannons on the decks below. Peckell reported that he had recovered 30 cartloads of wood from the ship; these might have included not just planking and structural details but also some of the sculptures which today are missing, such as the life-size Roman warrior near the bow and the sculpture of Septimius Severus that adorned the port side of thebeakhead.[86]
SinceVasa lay in a busy shipping channel, ships occasionally dropped anchor over her, and one large anchor demolished most of the upper sterncastle, probably in the 19th century. Construction work in Stockholm harbor usually entails blasting of bedrock, and the resulting tonnes of rubble were often dumped in the harbor; some of this landed on the ship, causing further damage to the stern and the upper deck.[87]
In the early 1950s, amateurarchaeologistAnders Franzén considered the possibility of recovering wrecks from the coldbrackish waters of theBaltic because, he reasoned, they were free from theshipwormTeredo navalis, which usually destroys submerged wood rapidly in warmer, saltier seas. Franzén had previously been successful in locating wrecks such asRiksäpplet andLybska Svan, and after long and tedious research he began looking forVasa as well. He spent many years probing the waters without success around the many assumed locations of the wreckage. He did not succeed until, based on accounts of an unknown topographical anomaly just south of the Gustav V dock onBeckholmen, he narrowed his search.[88]
In 1956, with a home-made, gravity-powered coring probe, he located a large wooden object almost parallel to the mouth of dock on Beckholmen. The location of the ship received considerable attention, even if the identification of the ship could not be determined without closer investigation. Soon after the announcement of the find, planning got underway to determine how to excavate and raiseVasa. The Swedish Navy was involved from the start, as were various museums and the National Heritage board, representatives of which eventually formed theVasa Committee, the predecessor of theVasa Board.[88]
The hulk of theVasa after recovery operations, 14 May 1961
A number of possible recovery methods were proposed, including filling the ship with ping-pong balls and freezing her in a block of ice, but the method chosen by the Vasa Board (which succeeded the Vasa Committee) was essentially the same one attempted immediately after the sinking. Divers spent two years digging six tunnels under the ship for steel cable slings, which were taken to a pair of liftingpontoons at the surface. The work under the ship was extremely dangerous, requiring the divers to cut tunnels through the clay with high-pressure water jets and suck up the resulting slurry with a dredge, all while working in total darkness with hundreds of tonnes of mud-filled ship overhead.[89] A persistent risk was that the wreck could shift or settle deeper into the mud while a diver was working in a tunnel, trapping him underneath the wreckage. The almost vertical sections of the tunnels near the side of the hull could also potentially collapse and bury a diver inside.[90] Despite the dangerous conditions, more than 1,300 dives were made in thesalvage operation without any serious accidents.[91]
Each time the pontoons were pumped full, the cables tightened and the pontoons pumped out, the ship was brought a meter closer to the surface. In a series of 18 lifts in August and September 1959, the ship was moved from a depth of 32 to 16 meters (105 to 52 feet) in the more sheltered area of Kastellholmsviken, where divers could work more safely to prepare for the final lift.[92] Over the course of a year and a half, a small team of commercial divers cleared debris and mud from the upper decks to lighten the ship, and made the hull as watertight as possible. The gun ports were closed by means of temporary lids, a temporary replacement of the collapsed sterncastle was constructed, and many of the holes from the iron bolts that had rusted away were plugged. The final lift began on 8 April 1961, and on the morning of 24 April,Vasa was ready to return to the world for the first time in 333 years. Press from all over the world, television cameras, 400 invited guests on barges and boats, and thousands of spectators on shore watched as the first timbers broke the surface. The ship was then emptied of water and mud and towed to the Gustav Vdry dock on Beckholmen, where the ship was floated on her own keel onto a concrete pontoon, on which the hull still stands.[93]
From the end of 1961 to December 1988,Vasa was housed in a temporary facility called Wasavarvet ("The Vasa Shipyard"), which included exhibit space as well as the activities centred on the ship. A building was erected over the ship on her pontoon, but it was very cramped, making conservation work awkward. Visitors could view the ship from just two levels, and the maximum viewing distance was in most places only a couple of meters, which made it difficult for viewers to get an overall view of the ship. In 1981, the Swedish government decided that a permanent building was to be constructed, and a design competition was organized. The winning design, by the Swedish architects Månsson and Dahlbäck, called for a large hall over the ship in a polygonal, industrial style. Ground was broken in 1987, andVasa was towed into the half-finishedVasa Museum in December 1988. The museum was officially opened to the public in 1990.[94]
Vasa posed an unprecedented challenge for archaeologists. Never before had a four-storey structure, with most of its original contents largely undisturbed, been available for excavation.[95] The conditions under which the team had to work added to the difficulties. The ship had to be kept wet in order that she not dry out and crack before she could be properly conserved. Digging had to be performed under a constant drizzle of water and in a sludge-covered mud that could be more than 1 metre (3 ft 3 in) deep.[96]
In order to establish find locations, the hull was divided into several sections demarcated by the many structural beams, the decking and by a line drawn along the centre of the ship from stern to bow. For the most part, the decks were excavated individually, though at times work progressed on more than one deck level simultaneously.[96]
Vasa had four preserved decks: the upper and lower gundecks, the hold and theorlop. Because of the constraints of preparing the ship for conservation, the archaeologists had to work quickly, in 13-hour shifts during the first week of excavation. The upper gundeck was greatly disturbed by the various salvage projects between 1628 and 1961, and it contained not only material that had fallen down from the rigging and upper deck, but also more than three centuries of harbor refuse.[97]
The decks below were progressively less disturbed. The gundecks contained not just gun carriages, the three surviving cannons, and other objects of a military nature, but were also where most of the personal possessions of the sailors had been stored at the time of the sinking. These included a wide range of loose finds, as well as chests and casks with spare clothing and shoes, tools and materials for mending, money (in the form of low-denomination copper coins), privately purchased provisions, and all of the everyday objects needed for life at sea.[98]
Abackgammon set found onVasa, complete withdice and markers
Most of the individual finds on board are of wood, testifying not only to the simple life on board, but to the generally unsophisticated state of Swedish material culture in the early 17th century. The lower decks were primarily used for storage, and so the hold was filled with barrels of provisions and gunpowder, coils of anchor cable, iron shot for the guns, and the personal possessions of some of the officers. On the orlop deck, a small compartment contained six of the ship's ten sails, rigging spares, and the working parts for the ship's pumps. Another compartment contained the possessions of the ship's carpenter, including a large tool chest.[98]
After the ship herself had been salvaged and excavated, the site of the loss was excavated thoroughly during 1963–1967. This produced many items of rigging as well as structural timbers that had fallen off, particularly from the beakhead and sterncastle. Most of the sculptures that had decorated the exterior of the hull were also found in the mud, along with the ship's anchors and the skeletons of at least four people. The last object to be brought up was the 11.7-metre-long (38 ft)longboat, calledesping in Swedish, found lying parallel to the ship and believed to be towed byVasa when she sank.[99][100]
Many of the more recent objects contaminating the site were disregarded when the finds were registered, but some were the remains of the 1660s salvage efforts, and others had their own stories to tell. Among the best-known of these was a statue of 20th-century Finnish runnerPaavo Nurmi, which was placed on the ship as a prank by students ofHelsinki University of Technology (nowAalto University) the night before the final lift.[101][102]
Former Vasa Museum Director Klas Helmerson (left) explaining aspects of the sinking of the ship to then US Defense SecretaryWilliam Cohen (centre) and Swedish Defense MinisterBjörn von Sydow (right).
Vasa sank because she had very littleinitial stability—resistance toheeling under the force of wind or waves acting on the hull. This was due to the distribution of mass in the hull structure, and to the ballast, guns, provisions, and other objects loaded on board placing a lot of weight too high in the ship. This put thecentre of gravity very high relative to thecentre of buoyancy, thus making the ship readily heel in response to little force, and not providing enoughrighting moment for her to become upright again.
The guns weighed little over 60 tonnes (59 long tons; 66 short tons), about 5% of the total displacement of the loaded ship, not enough in themselves to cause the ship to capsize. The reason for the high centre of gravity was the hull construction. The part of the hull above the waterline was too high and too heavily built in relation to the amount of hull in the water. The headroom in the decks was higher than necessary for crewmen who were, on average, 1.67 meters (5 feet 6 inches) tall, making the weight of the decks and the guns higher than needed. In addition, the deck beams and their supporting timbers were over-dimensioned and more closely spaced than required for the loads they carried, contributing too much weight to the already tall and heavy upper works.[103]
During construction bothSwedish feet (of 29.69 cm) andAmsterdam feet (of 28.31 cm) were in use by different teams. Four rulers used by the workmen who built the ship have been found; two were calibrated in Swedish feet, of 12 Swedish inches, and the other two were calibrated in Amsterdam feet, of 11 Amsterdam inches. The use of different units of length on the two sides of the vessel caused the ship to be heavier on the port side.[104]
Although the mathematical tools for calculating or predicting stability were still more than a century in the future, and 17th-century scientific ideas about how ships behaved in water were deeply flawed, the people associated with building and sailing ships for the Swedish navy were very much aware of the forces at work and their relationships to each other. In the last part of the inquest held after the sinking, a group of master shipwrights and senior naval officers were asked for their opinions about why the ship sank. Their discussion and conclusions show very clearly that they knew what had happened, and their verdict was summed up very clearly by one of the captains, who said that the ship did not have enough "belly" to carry the heavy upperworks.[105] When other ships that predated stability calculations were found to lack stability, remedial action could be taken to increase the beam. This could involve adding an extra layer of planking below the waterline (this was called "girdling"). More drastically, the process of furring could be used: planking was removed and extra pieces of wood were added to the frames to increase the molded breadth. Then the planking was replaced.[106]
Vasa might not have sunk when she did if the ship had sailed with the gunports closed. Ships with multiple tiers of gunports normally sailed with the lowest tier closed, since the pressure of wind on the sails would often push the hull over until the lower gunport sills were under water. For this reason the gunport covers were made with a double lip designed to seal well enough to keep out most of the water. Captain Söfring Hansson had ordered the lower gundeck ports closed once the ship began to take on water, but by then it was too late. If he had done it before he sailed,Vasa might not have sunk on that day.[105]
Vasa during the early stages of conservation at the Wasa Shipyard.
AlthoughVasa was in surprisingly good condition after 333 years at the bottom of the sea, she would have quickly deteriorated if the hull had been simply allowed to dry. The large bulk ofVasa, over 600 cubic meters (21,000 cu ft) of oak timber, constituted an unprecedented conservation problem. After some debate on how to best preserve the ship, conservation was carried out by impregnation withpolyethylene glycol (PEG), a method that has since become the standard treatment for large, waterlogged wooden objects, such as the 16th-century English shipMary Rose.Vasa was sprayed with PEG for 17 years, followed by a long period of slow drying, not entirely complete by 2011.[107]
The reason thatVasa was so well-preserved was not just that theshipworm that normally devours wooden ships was absent, but also that the water ofStockholms ström was heavily polluted until the late 20th century. The highly toxic and hostile environment meant that even the toughest microorganisms that break down wood had difficulty surviving. This, andVasa being newly built and undamaged when she sank, contributed to her conservation. However, some properties of the water were harmful. Chemicals present in the water aroundVasa had penetrated the wood, and the timber was full of the corrosion products from the bolts and other iron objects which had corroded away. Once the ship was exposed to the air, reactions began inside the timber that produced acidic compounds. In the late 1990s, spots of white and yellow residue were noticed onVasa and some of the associated artefacts; these turned out to besulfate-containing salts that had formed on the surface of the wood whensulfides reacted with atmospheric oxygen. The salts on the surface ofVasa and objects found in and around her are not a threat in themselves despite the discoloring, but if they are from inside the wood, they may expand and crack the timber from inside. As of 2002, the amount ofsulfuric acid inVasa's hull was estimated to be more than 2 tonnes (4,400 lb), and more is continually being created. Enough sulfides are present in the ship to produce another 5,000 kilograms (11,000 pounds) of acid at a rate of about 100 kilograms (220 pounds) per year; this might eventually destroy the ship almost entirely.[108]
While most of the scientific community considers that the destructive substance responsible forVasa's long-term decay is sulfuric acid, Ulla Westermark, professor of wood technology atLuleå University of Technology, has proposed another mechanism with her colleague Börje Stenberg. Experiments done by Japanese researchers show that treating wood withPEG in an acidic environment can generateformic acid and eventually liquify the wood.Vasa was exposed to acidic water for more than three centuries, and therefore has a relatively low (acidic) pH. Samples taken from the ship indicate that formic acid is present, and that it could be one of the multiple causes of a suddenly accelerated rate of decomposition.[109]
The preservedVasa in the main hall ofVasa Museum seen from above the bow.
The museum is constantly monitoring the ship for damage caused by decay or warping of the wood. Ongoing research seeks the best way to preserve the ship for future generations and to analyze the existing material as closely as possible. A current problem is that the oldoak of which the ship is built has lost a substantial amount of its original strength, and the cradle that supports the ship is not well suited to the distribution of weight and stress in the hull. "The amount of movement in the hull is worrying. If nothing is done, the ship will most likely capsize again", states Magnus Olofson from theVasa Museum. An effort to secureVasa for the future is under way, in cooperation with theRoyal Institute of Technology and other institutions around the globe.[110]
To deal with the problem of the inevitable deterioration of the ship, the main hall of theVasa Museum is kept at a temperature of 18–20 °C (64–68 °F) and a humidity level of 53%. Different methods have been tried to slow destruction by acidic compounds. Small objects have been sealed in plastic containers filled with an inert atmosphere ofnitrogen gas, to prevent further reactions between sulfides and oxygen. The ship herself has been treated with cloth saturated in abasic liquid to neutralize the low pH, but this is only a temporary solution as acid is continuously produced. The original bolts rusted away after the ship sank, but were replaced with modern ones that weregalvanized and covered withepoxy resin. Despite this, the newer bolts also started to rust and were releasing iron into the wood, accelerating the deterioration.[111]
Between 2011 and 2018, the Vasa Museum and the Swedish materials technology groupAlleima undertook a long-term research and development project to replace the galvanised bolts with specially designed high alloy stainless steel substitutes, made up of eight components. The steel from which the replacement bolts were manufactured, designated as SAF 2707 HD, is corrosion-resistant, can withstand exposure to the harshest environments, and is normally used in the oil-and-gas industry.[112]
The Museum announced at the end of 2023 that it would be building a replacement cradle and new internal support skeleton for theVasa at a total cost ofSEK 150 million. Funding was sought from donors and sponsors. Researching the project, and work on construction drawings, had already taken four years; test operations on full-scale models had also been carried out. The project itself, anticipated to take about a further four years, was scheduled to begin in spring 2024.[113] A consequence of this work is that the interior of the ship will have many support structures added to it, so impairing the visual impression of the lower decks and interior spaces. Therefore a visual record has been made of the appearance of the inside of the ship before the start of this work.[114]
Within 20 years of the sinking ofVasa, Sweden ceased using Dutch shipwrights and instead employed English expertise. Whilst it is suggested this change was due toKing Karl X Gustav being impressed by an English-built ship that he saw, it is likely that the design processes used in English shipyards fitted better with the Swedish state as customer. In contrast to the older traditional methods used by the Dutch, English shipwrights put plans for a new ship on paper and built models for discussion with those paying for construction.[115]
In the 20th century,Vasa became a popular and widely recognized symbol for a historical narrative about the Swedishstormaktstiden ("the Great Power-period") in the 17th century, and about the early development of a Europeannation state. Within the disciplines of history andmaritime archaeology the wrecks of large warships from the 16th, 17th and 18th centuries have received particularly widespread attention as perceived symbols of past greatness of the state of Sweden. Among these wrecks,Vasa is the best-known example, and has become recognized internationally, not least through intentional use of the ship as a symbol for marketing Sweden abroad.[116]
The nameVasa has in Sweden become synonymous with sunken vessels that are considered to be of great historical importance, and these are usually described, explained and valued in relation toVasa herself.[116] The Swedish maritime archaeologist Carl-Olof Cederlund, who has been active in the variousVasa-projects, has described the phenomenon asregalskepps-syndromet, "the royal ship syndrome" (after the term used in the 17th century for the largest warships in the Swedish navy). He associates the "syndrome" to a nationalist aspect of thehistory of ideas and traditional perceptions about hero-kings and glory through war.[117]
The focus of this historical theory lies on the "great periods" in "our [Swedish] history" and shares many similarities with the nationalist views of theViking Age in the Nordic countries and the praising of Greek and RomanAntiquity in the Western world in general.[117] Cederlund has stressed the ritualized aspects of the widely publicized salvage in 1961 and has compared the modern Vasa Museum with "a temple in the Classical sense of the word". The placement of the museum on Djurgården, traditional crown property, and its focus on "the King's ship" has led him to suggest a description of it as "The Temple of the Royal Ship".[118]
Merchandise and books based onVasa on sale at the Vasa Museum gift shop in 2007
Vasa's unique status has drawn considerable attention and captured the imagination of more than two generations of scholars, tourists, model builders, and authors. Though historically unfounded, the popular perception of the building of the ship as a botched and disorganized affair (dubbed "theVasa-syndrome") has been used by many authors of management literature as an educational example of how not to organize a successful business.[119] InThe Tender Ship,Manhattan Project engineerArthur Squires used theVasa story as an opening illustration of his thesis that governments are usually incompetent managers of technology projects.[120]
The Japanese sightseeing ship onLake Ashi inspired byVasa.
The Vasa Museum has co-sponsored two versions of a documentary about the history and recovery of the ship, both by documentary filmmakerAnders Wahlgren. The second version was shown in the museum and released on VHS and DVD with narration in 16 languages. In late 2011, a thirdVasa-film premiered on Swedish television, with a longer running time and a considerably larger budget (with over 7.5 million kronor provided bySVT).[121]
An educational computer game was made and is used in the museum and on its website to explain the fundamentals of 17th-century ship construction and stability. Several mass-produced model kits and countless custom-built models of the ship have been made. In 1991, a 308-tonne (303-long-ton; 340-short-ton)pastiche reproduction of the ship was built in Tokyo to serve as a 650-passenger sightseeing ship.Vasa has inspired many works of art, including a gilded Disney-themed parody of thepilaster sculptures on the ship's quarter galleries.[122]
Being a popular tourist attraction,Vasa is used as a motif for various souvenir products such as T-shirts, mugs, refrigerator magnets, and posters. Commercially produced replicas of many of the objects found on the ship belonging to people on board, such as drinking glasses, plates, spoons, and even abackgammon game, have been made.[123]
^The Swedish term for theglobus cruciger, the regal orb and cross, isäpple orriksäpple, literally "apple (of the realm)".
^Vasa was actually never referred to as aregalskepp before she was lost, but was classified as one afterwards;[12]
^The mounds of sail cloth were moved by driving metal sheets underneath each heap and then dragging each sheet out of the sail room and under a hatch. From here, they could be lifted out of the ship and sent for conservation.
^As a potential source of confusion, the ship's boat's mainsail is aspritsail – the fore-and-aft sail with this name. This is different from the square sail, also called aspritsail, which was set from the bowsprit ofVasa
^A bonnet could have been fitted to the main course, though this was not usually done and the main course has no provision for one to be fitted inVasa. As noted above,Vasa's mizzen did have a bonnet.
^This method of operating this version of square rig has been demonstrated in the replica ofDuyfken, with the technique based on, among other things, extensive research of the paintings of ships from this era. The term "half mast" is used byJohn Narborough, his precise usage being, for example: "it blew so hard that we could not carry out our lower tier of guns, nor our topsails above half mast up."[47][48]
^Iconographic information shows reef points being used in ships in early medieval times, but these went out of fashion for larger craft until reefing topsails were introduced in the mid-seventeenth century, followed ultimately by other square sails also having reef points.[49]
^If a topsail is the only sail set on a mast, the lower yard has to be in the hoisted position underneath the topsail, so as to give somewhere for the topsail sheets to attach. This introduces the concept of lower yards that remain permanently hoisted. Consequently, there is more work to be done aloft – ultimately square rig changed to have a different arrangement to brail the sail up to the yard (replacing themartnet) andfootropes were invented to assist work aloft, bothc. 1650.[53]
^abA knighthead is a timber post (technically a type ofbitt) at the foot of a mast to which, typically, halyards were made fast. Often, they have sheaves fitted in them to match the blocks with which they are paired to give a large mechanical advantage in lifting heavy loads. The knightheads inVasa are attached to deck beams with open-face dovetail joints, some of them extending over two decks to distribute the large loads involved. They get their name from the heads carved into the top of them for decoration. The main knighthead onVasa is below decks, on the upper gundeck. Here the fall from the tackle could be taken to the main capstan.[55]
^No steering compasses were recovered from the wreck ofVasa, but the survival of the bittacle is clear evidence of their existence.[63]
^Before being crowned as king, Charles had been duke ofSödermanland, whose coat of arms included a griffinsegreant, standing with its front legs raised.[68]
^"Teekkarien kuningasjäynästä puoli vuosisataa" [Half a century after the famous hack by the University of Technology students] (in Finnish).Yle. 28 April 2011.Archived from the original on 14 February 2016. Retrieved19 February 2016.
^Cederlund 1997, p. 15; original quotes: "ett tempel i klassisk bemärkelse"; "Det Kungliga Skeppets Tempel".
^For example this article fromIEEE computing: Richard E. Fairley, Mary Jane Willshire, "Why the Vasa Sank: 10 Problems and Some Antidotes for Software Projects,"IEEE Software vol. 20, no. 2, pp. 18–25, March/April 2003; see also Hocker, Fred "Catastrophe" inCederlund 2006, p. 58
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