Augsburg, Germany
1512
Bonn, Germany
1715-1746
Hanover, Germany
1636
Potsdam, Germany
1914-1917
Coburg, Germany
1543
Brühl, Germany
1725-1768
Schwetzingen, Germany
1700-1750
Landshut, Germany
1536
Aschaffenburg, Germany
1605-1614
Coesfeld, Germany
1703-1734
Dachau, Germany
1546
Donaueschingen, Germany
18th century
Düsseldorf, Germany
1755-1770
Mannheim, Germany
1720
Oranienburg, Germany
1651-1655
Biebrich, Germany
1702
Lichtenwalde, Germany
1722-1730
Fulda, Germany
1706-1714
Weikersheim, Germany
1586
Berlin, Germany
1677
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.