Zoo Tower

The Zoo flak tower (Flakturm Tiergarten, Tiergarten Flak Tower or commonly referred to as the "Zoo Tower") was a fortified flak tower that existed in Berlin from 1941 to 1947. It was one of several flak towers that protected Berlin from Allied bomber raids. Its primary role was as a gun platform to protect the government building district of Berlin; in addition, the Hochbunker (blockhouse) was designed to be used as a civilian air-raid shelter. It also contained a hospital and a radio transmitter for use by the German leadership and provided secure storage facilities for art treasures. During the Battle of Berlin, it acted as a citadel and by depressing its large anti-aircraft artillery, its garrison was able to provide support for ground operations against the Soviet Red Army.

Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).