Château de Launac was built by the viscounts of Gimoes in the 12th century. In 1148 the castle passed into the house of Isle Jourdain. Dismantled after the Treaty of Paris in 1229, the fortress was rebuilt in the fifteenth century by Carmaing Nègrepelisse. It consisted of four corner towers including an old keep from the twelfth century.
This castle was undoubtedly again dismantled by Cardinal Richelieu under the reign of Louis XIII. Today two wings remain. Inside the castle is a monumental fireplace and painted decorations from the XVth century.
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.