The fortifications of the former East Prussian capital Königsberg (now Kaliningrad) consist of numerous defensive walls, forts, bastions and other structures.
[2] The new belt included twelve bastions, three ravelins, seven spoil banks and two fortresses, surrounded by a water moat.
[2] Ten brick gates served as entrances and passages through defensive lines and were equipped with moveable bridges.
[3] The Dohna Tower (German: Dohnaturm) was built in 1858 in Neo-Romanesque style[1] and is named after Prussian politician Friedrich Ferdinand Alexander zu Dohna-Schlobitten.
It remained in better condition than some other fortifications because it lay a bit aside from the places of the main Soviet attacks during World War II.