 Map of Ertholmene | |
 Location of Ertholmene in Denmark | |
| Geography | |
|---|---|
| Location | Baltic Sea |
| Coordinates | 55°19′12″N15°11′16″E / 55.32000°N 15.18778°E /55.32000; 15.18778 |
| Administration | |
| Fæstningen Christiansø | |
|---|---|
| Northeast ofBornholm,Denmark | |
 Lille Tårn ("Little Tower") on Frederiksø | |
| Type | Naval fortress |
| Site information | |
| Controlled by | Denmark |
| Site history | |
| Built | 1684 |
| In use | 1684–1855 (1863) |
| Battles/wars | Gunboat War |
| Designations | |
|---|---|
| Official name | Ertholmene |
| Designated | 9 February 1977 |
| Reference no. | 165[1] |
Ertholmene (formerly spelledÆrtholmene) is a small archipelago inDenmark. The largest island isChristiansø, whose nameis often used with reference to the entire archipelago.[2] Ertholmene are situated 18 kilometres (11 mi) northeast ofGudhjem,Bornholm, and include Denmark'seasternmost point.[2] Two of the islands, Christiansø and Frederiksø, are inhabited,[2] with a combined permanent population (as of 2024[update]) of 91.[3] The archipelago has a total area of 39 hectares (96 acres). Its name is derived from the Danish for "pea islands".
Historically an important navy location, the fortress closed in 1855. Since then there has been no operable military infrastructure on the archipelago, but it remains under the formal administration of theMinistry of Defence, which employs 25 to 30 people for maintaining the islands' civilian infrastructure, museum and historical buildings.[4] Today the economy of Ertholmene is almost entirely based ontourism, with tens of thousands of visitors each year, the majority on day-trips from Bornholm during the summer months.[4] The archipelago's buildings and nature are protected by law, and access to the uninhabited islands is restricted.[5]
Ertholmene consists of three main islands, Christiansø, Frederiksø and Græsholm, plus a number of rocks andskerries. The inhabited islands of Christiansø and Frederiksø are accessible to visitors, but the remaining are only accessible to people with special permission.[5]
Fishermen from Bornholm have used Ertholmene for temporary shelter since theMiddle Ages. The first permanent settlement was the result of the Danish-Swedish conflicts in the late 17th century. As Denmark needed a naval base in the central Baltic Sea, afortress was built on Christiansø and Frederiksø in 1684 which served as an outpost for theDanish Navy until 1855.Christiansø Church originally served the garrison.[10] The population peaked at the census in 1810 which showed 829 inhabitants. They were soldiers and were there because of theGunboat War.
Many of the historical buildings now serve as living quarters for the local population, and some are rented, year after year, to regular summer residents. The islands' external appearance has changed very little in over 300 years. Girdled by thick granite walls with old cannons pointed seaward, Christiansø is a picturesque tourist spot seemingly frozen in time. A former part of the fortress,Store Tårn has housed theChristiansø Lighthouse for the past 200 years,[11] and a small round tower on Frederiksø,Lille Tårn, serves as a museum.
Together with Bornholm, Ertholmene is part of Landsdel Bornholm. Ertholmene makes up the Parish of Christiansø in theChurch of Denmark and is served byChristiansø Church. On 1 January 2017 out of 78 inhabitants in total there were 69 members of the Church of Denmark (88.46% of the population). Ertholmene has never been part of a municipality, county, or region.
The islands form anunincorporated area that does not belong to either a municipality or a region. Instead they are state property governed by an administrator, appointed by theDanish Ministry of Defence, with the responsibility being the tasks normally performed by municipalities and other public sector civil services.[4]
The major sources of income in Ertholmene istourism. There are about 45,000 visitors per year, mostly day visitors arriving via Bornholm during the summer months.[4] Ertholmene is also a popular destination foryachting. Fishing used to be the main source of income, but today there are no commercial fishers on the islands.[12]
The islanders, who do not pay municipal taxes of any kind and were never part of a municipality, were exempt from the central government "Health Contribution" tax (Sundhedsbidrag) which stood at 8% when it was introduced on 1 January 2007 withKommunalreformen ("The Municipal Reform" of 2007), because it was thought that the relatively isolated islets would otherwise be abandoned. This tax replaced thecounty tax, which the islanders were also exempt from paying, not being part of a county. From 1 January 2019 this tax has been abolished, while income taxes in the lowest bracket have been raised simultaneously instead with this tax being phased out. From 2012, the tax was lowered by one percentage point per year.[13][14]
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