Introduction to the crematorium: In order to keep up with the killing speed of the gas chamber, the crematorium adopts the newly invented three-layer giant crematorium, which can accommodate two to three corpses at a time and can burn 350 corpses in a day and night. After it ceased use in July 1943, it became an SS air raid shelter. Judging from the records kept by the Nazis, many prisoners died within a few months after arriving here, and some even died within a few days.