Marssum, Netherlands
16th century
's-Graveland, Netherlands
1654
Werkhoven, Netherlands
1835-1862
Veenklooster, Netherlands
17th century
Ezinge, Netherlands
15th century
Wedde, Netherlands
1362
Maarssenbroek, Netherlands
1825
Ysbrechtum, Netherlands
1620-1625
Jelsum, Netherlands
14th century
Hague, Netherlands
1645
Doetinchem, Netherlands
1656
Niebert, Netherlands
1400
Sexbierum, Netherlands
1862
Den Ham, Netherlands
1633
Hegebeintum, Netherlands
19th century
Uithuizermeeden, Netherlands
1710
Nijmegen, Netherlands
14th 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.