Lordat, France
10th century
Lacroix-Barrez, France
12th century
Rouet, France
12th century
Roquefixade, France
13th century
Saint-Élix-le-Château, France
1540-1548
Prunières, France
12th century
Sainte-Enimie, France
1420
Montpeyroux, France
14th century
Saint-Saturnin, France
13th century
Senouillac, France
13th century
Agel, France
12th century
Lagarde, France
11th century
Esterre, France
10th century
Roquessels, France
10th century
Launac, France
12th century
Avezan, France
c. 1230
Magrin, France
13th century
Miglos, France
13th century
Salles-la-Source, France
13th century
Saint-Julien-du-Tournel, France
13th century
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.