Słupsk, Poland
1507
Bobolice, Poland
14th century
Jelenia Góra, Poland
1292
Gołuchów, Poland
16th century
Kórnik, Poland
14th century
Grodziec, Poland
12th century
Głogówek, Poland
16th century
Gmina Reszel, Poland
1350
Sandomierz, Poland
14th century
Paniówki, Poland
16th century
Będzin, Poland
13th century
Płock, Poland
1351
Województwo dolnoslaskie, Poland
12th century
Karpniki, Poland
15th
Przemyśl, Poland
1340
Rzeszów, Poland
16th century
Golub-Dobrzyñ, Poland
c.1300
Wieluń, Poland
14th century
Janowiec, Poland
1508-1526
Chojnice, Poland
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.