Anne, Margot, their mother, and Auguste stayed at Auschwitz-Birkenau, the Nazis’ largest concentration and extermination camp. Conditions and food were poor. The Nazis let the prisoners live as long as they were able to work. People who could not work were killed immediately upon their arrival or when they became exhausted or fell ill. At Auschwitz-Birkenau and Auschwitz I, the smaller camp, nearly 1 million Jews from all over Europe and hundreds of thousands of Poles, Roma, Sinti, Soviet prisoners of war, and resistance fighters were imprisoned and murdered.