Stockholm, Sweden
17th - 18th century
Stockholm, Sweden
ca. 1270-1300
Uppsala, Sweden
1287-1435
Ekerö, Sweden
1662
Mariefred, Sweden
16th century
Vadstena, Sweden
1346
Gamla Uppsala, Uppsala, Sweden
400-500 AD
Varnhem, Sweden
ca. 1150
Götene, Sweden
12th century
Adelsö, Sweden
ca. 750 AD
Visingsö, Sweden
mid-1100s
Uppsala, Sweden
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.