The Auschwitz concentration camps in Poland are one of the darkest sides of the Holocaust. At its peak in 1944, they housed about 135,000 prisoners. Auschwitz I was the largest and responsible for 70,000 deaths. The sign above the main gates still reads in German: “Work Makes Freedom.” The camp contains 16 brick buildings that were guarded by towers, barbed wire and warning signs painted with skulls and crossbones called Totenkopf in German.
