The crematoria in Auschwitz-Birkenau, the largest Nazi concentration and extermination camp, were central to the mass murder of prisoners during the Holocaust. Located in occupied Poland, Auschwitz-Birkenau had several crematoria, equipped with gas chambers where countless Jews, Romani people, and others were killed. After the gassing, the bodies were burned in the crematoria to eliminate evidence of the atrocities. These crematoria, operational from 1943 to 1944, symbolize the industrial scale of the genocide. The remains of these structures now stand as a stark reminder of the horrors perpetrated during World War II.