Fort no. 6 (Jarema Wisniowiecki), until 1920 known as Fort no. 3a (Dohna), built in 1889-93 and in great part destroyed after 1945
Fort no. 6 (Jarema Wisniowiecki), until 1920 known as Fort no. 3a (Dohna), built in 1889-93 and in great part destroyed after 1945 Military - Historic By: piotr_k