Laidi, Latvia
1808-1810
Cēres, Latvia
1860s
Īvande, Latvia
19th century
Stāmeriena, Latvia
1835-1843
Burtnieki, Latvia
1860s
Jaunauce, Latvia
19th century
Varakļāni, Latvia
1783-1789
Apriķi, Latvia
1742
Bojas, Latvia
1860
Dzērvenieki, Latvia
1906-1912
Jaunlutriņi, Latvia
19th century
Cirava, Latvia
1868
Sieksāte, Latvia
1855
Preiļi, Latvia
1860-1865
Snēpele, Latvia
19th century
Blankenfelde, Latvia
1743
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.