Uniformed prisoners with triangular badges are assembled under Nazi guard at the Sachenhausen concentration camp. Sachsenhausen, Germany, 1938. Photograph »

View of the kitchen barracks, the electrified fence, and the gate at the main camp of Auschwitz (Auschwitz I). In the foreground is the sign "Arbeit Macht Frei." This photograph was taken after the liberation of the camp by Soviet forces. Auschwitz, Poland, 1945. Photograph »

Prisoners during a roll call at the Buchenwald concentration camp. Their uniforms bear classifying triangular badges and identification numbers. Buchenwald, Germany, 1938-1941. Photograph »