David Olere was among the Sonderkommando “special crew” workers in the Auschwitz-Birkenau camp, mainly assigned to Crematorium III. Olere was one of the rare Sonderkommando who survived. In 1945 and 1946, from a sense of moral obligation, he made some 70 drawings documenting what he had experienced and seen. These are of great testimonial value, as what occurred in the gas chambers and crematoria was not directly documented. He was the sole witness, forced to take part in the act of extermination. In several of the drawings he appears as a participant-witness. The majority of this series is held in the Art Collection of the Ghetto Fighters’ House Museum.