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The existence of the earliest forts inIndia have been substantiated by documentation and excavation. In the medieval times, the architecture of the forts had both Hindu and Muslim influence. The forts constructed by theBritish initially opted for simple designs. The existing castles are continually modified and many of them are privately owned.
Most of the forts inIndia are actuallycastles orfortresses—but when the British Government in India were cataloging them in the 17th–19th century they used the word forts as it was common in Britain then. All fortifications whether European or Indian were termed forts. Thereafter this became the common usage in India. In local languages, the fort names are suffixed by local word for fort thus usage of theSanskrit worddurga, or Urdu wordqila or theHindi wordgarh orgad in Rajasthan, and Maharashtra is common.[1] For example,Suvarnadurg,Mehrangarh,Sudhagad etc.
Three major methods were used for the construction of ancient Indian forts. The first consisted of earthenramparts. Often, they were constructed of the sand which was dug out of the ditch surrounding the fort. The second of rubble with earth on the outside which was more sturdy. The third type of construction was with stone and masonry work. The last was the strongest. Often materials from demolished forts were reused in the building of new forts.[2]
By 4th Century BCE, fortified cities were common in India. The largest ones were between the city ofMathura (on the Yamuna river) andMagadha (on the Ganges). Another series of forts in the south, was on theUjjain (on the Narmada) leading into the Deccan. These are inferred by the remains of fort walls and bastions seen on excavation atRajagriha and at several sites in the Gangetic plain notablyKaushambi. At the latter site huge walls of burnt brick, which look like they have been battered.[3]
There are few descriptions of these ancient structures. The most noted is the one byMegasthenes, an ambassador ofSeleucus I Nicator to the court ofChandragupta Maurya. He describesPataliputra as being guarded by a ditch with wooden walls. The fort had 570 towers and 54 gates with colonnaded halls decorated with gold and silver. One such hall has been excavated and is one of the oldest stone structures in India.[4]
Though most of the structures have decayed and are lost, India's legacy of ancient forts is seen mostly in the shastras (ancient Indian treatises) and in the reliefs on stupas.[5] On some of the early relief work, the carvings indicate that ancient Indian forts have crenellations, embrasures, and sloping walls.[3]
TheArthashastra the Indian treatise on military strategy describes six major types of forts differentiated by their major modes of defenses:[6]
Each of these types had its own advantages and disadvantages. For example, according to theManusmṛti, the forest fort suffers from monkey attacks, the earthen forts get swarmed with rodents, the water forts were plagued by diseases etc. TheManusmṛti considers the Hill fort to be the best defensive structure. Some Sanskrit text consider hill forts to be the abode of gods and hence auspicious. TheMahabharata describes the Human fort as the most effective fortification.[6]
With the advent of the Muslims, closely followed by the introduction of artillery in the 16th century there were several changes to the construction and design of forts. These changes were similar to the changes that took place in Western forts with the advent of gunpowder, i.e. the lowering of walls, thickening of walls, further pushing out of bastions etc.[7]The construction of a citadel in the center and putting in more area between the citadel and the walls was characteristic of Muslim forts (influenced in turn by the Norman mote and bailey). Classic examples of such structures are the Golkonda and Berar forts.[8]
The gates of medieval Indian forts were highly decorated.[9] Two distinct styles are seen. The Hindu style with a lintel, and the Mughal style with an arch. Gates in Indian forts were often high and wide to allow elephants to pass.[10] Often they had rows of sharp, stout iron spikes to dissuade an attacking army from using elephants to break down the gates.[11] Such a gate with spikes can be seen on theShaniwarwada fort,Pune. The walls of the forts were often looked higher from the outside than the inside as the forts made use of the natural rock formations on hills. This not only gave an illusion of greater height but also lead to the lower walls of the fort to be entirely made up of natural rock providing almost a perfect defense against the use of abattering ram orwar elephants to tear down the walls.[12] The main gate to the forts was located mostly facing north direction, this was to avoid its deterioration by the rains, winds and the sun.
Stone was the most important material for building fortifications in medieval India. Walls were erected by one of the following three construction methods. A wall could be an earthen rampart faced with stone on both sides. The rampart was built using the earth excavated while digging the ditch, with three-quarters of it usedfor building a rampart and one-quarter for leveling out the surface inside the fortress and in front of the ditch. Facing the rampart with stone allowed for the erection of higher and steeper walls than those possible with a purely earthen rampart. The structure had a substantial shortcoming, however: an earthen core accumulated water, which could destroy the stone shell. Drainage channels were therefore installed along the length of the wall from top to bottom. The main binding material for construction was Lime mortar.
The second method consisted of filling the space between the outer layers with earth mixed with rubble. This core was considerably harder than simply using rammed earth. The third and most advanced method involved the use ofmortar. A rubble-built wall fastened with mortar was strong and long lasting. Construction methods depended, however, on the materials available.[2]
During the building of the Sri Qila, DelhiAlauddin Khalji is reported to have buried 8,000 skulls of Mughals killed by him into the foundation.[13] During the building ofPurandar Fort one its bastions gave way several times. The king ofBerar then ordered his minister, Esaji Naik Chive to bury a first-born son and his wife into the foundation of the bastion. This was promptly done and after a further offering of gold and bricks. When the bastion was finished Esaji Naik was given possession of the fort and the father of the sacrificed boy was rewarded with two villages.[13] Along with the fortification, emphasis was also given for construction of rock cut water cistern, ponds, wells and lakes. To avoid evaporation of water, the water bodies were covered. At times rooms were built close to water bodies to keep the temperature low.
Many Indian fortifications have parapets with peculiarly shapedmerlons and complicated systems ofloopholes, which differ substantially from similar structures in other countries. Typical Indian merlons were semicircular and pointed at the top, although they were sometimes fake: the parapet may be solid and the merlons shown in relief on the outside (as at Chittorgarh). What was unique is the arrangement and direction of loopholes. Loopholes were made both in the merlons themselves, and under the crenels. They could either look forward (to command distant approaches) or downward (to command the foot of the wall). Sometimes a merlon was pierced with two or three loopholes, but more often, one loophole was divided into two or three slits by horizontal or vertical partitions. The shape of loopholes, as well as the shape of merlons, need not have been the same everywhere in the castle, as shown by Kumbhalgarh.[14][dubious –discuss]
With the advent of theEast India Company, the British established trading posts along the coast. The need for security against local rajas as well as other European rival nations led to the construction of forts at each post. Mumbai fort,Fort William inKolkata,Fort St George inChennai were the main bastions constructed. These cities developed from the small townships outside the forts. Parsimony of the East India Company, non-availability of trained engineers and use of local materials and artisans resulted in the simple design and construction initially. The vulnerability of these earlier forts, hostilities with the French and the growing might of the Company resulted in stronger and more complex designs for the second round of construction, the design of Fort St George reflecting the influences of the French engineerVauban.[15]
Although no Indian forts were destroyed by sudden disasters, there are several which were abandoned due to the ambitions of their rulers and have consequently deteriorated over time. Very few castles have survived unchanged since the early Middle Ages or even since the 14th-15th centuries: most of those built in the 10th-15th centuries were later rebuilt and altered. Castles were still used as living quarters until the 19th-20th centuries, and so were continually modified. Even now, some of them are private property.
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