Block 11
Block 11 was the name of a brick building in Auschwitz I, the Stammlager or main camp of the Auschwitz concentration camp network. This block was used for executions and torture. Between Block 10 and Block 11 stood the "Death Wall" where thousands of prisoners were lined up for execution by firing squad.
The block contained special torture chambers in which various punishments were applied to prisoners. Some could include being locked in a dark chamber for several days or being forced to stand in one of four standing cells called "Stehzelle" in German. Punishment in these special compartments, consisted of confining four prisoners, who were forced by the lack of space to remain standing all night for up to twenty nights, while still being forced to work during the day.
It was at Block 11 that the first attempts to kill people with Zyklon B were implemented in September 1941.