Block 11 was known as the "death block." It was the central camp jail. Prisoners from within the camp suspected of attempting to escape, organizing mutinies, or having contact with the outside world were held as were Poles from the outside world who had been arrested for rendering aid to prisoners. In the basement was the bunker where punishment cells for prisoners who violated camp regulations and were sentenced to death by starvation. From September 3-5, 1941, experiments with Zykon B were conducted on 600 Soviet prisoners of war and 250 Polish political prisoners in preparation for the mass murder of the Jews. This is the room where the Gestapo court was held. The most frequent sentence was death by shooting at the "death wall."