The Tour Vauban (Vauban Tower), initially known as the tour de Camaret, is an 18m-high polygonal defensive tower built to a plan by Vauban on the Sillon at Camaret-sur-Mer, as part of the fortifications of the goulet de Brest. It has three levels and is flanked by walls, a guardhouse and a gun battery which can hold 11 cannons as well as a cannonball foundry added in the French Revolution period.
Drafted in 1683, the tower was designed in 1689 by Vauban and construction was supervised by the military engineer Jean-Pierre Traverse from 1693 to completion in 1696. The 11 cannons in the battery are believed to have been forged with those for the battery on pointe du Grand Gouin, for the Quélern defensive-lines and the many neighbouring batteries. In the French victory in the Battle of Camaret on 18 June 1694, the battery and its two guard houses were only armed with nine 24-pounder cannon and three mortars firing 30 cm balls.
Camaret-sur-Mer is a member of the network of major Vauban sites. Since 7 July 2008 the tour Vauban and 11 other sites have been classed as a UNESCO World Heritage Site.
References:Bomarsund fortress and garrison was built in 1832-1854 by Russian Empire to defence Åland Islands against enemies. British and French fleet attacked against it during the Crimean War in 1854. After a week of fighting the British stormed the remaining fort. Anglo-French forces destroyed it totally after battle. In the Treaty of Paris 1856, the entire Åland Islands were demilitarized, which is a status that has been preserved until this day.
Nowadays there are some ruins left and fortress area is open for visitors.