Block 11 "Death Block"
Known as the Death Block, Block 11 served several functions. The most important role was the central camp jail. Most of these pople were suspected by the camp Gestapo of involvement in clandestine activities such as attempting to escape, organizing mutinies and maintaing contacts with the outside world.
In the basement, known as the bunker, were punishment cells where the SS confined prisoners regarded as guilty of violating camp regulrations. In 1941 prisoners senteced to death by starvation were held here.
Over the period of September 3-5, 1951 the SS carried out experiments in the basement with Zyklon B on 600 Soviet POWs and 250 Polish political prisoners who were selected from the camp infirmary as human gunea pigs in prepration for the mass murder of Jews.