The Sonderkommando photographs, Auschwitz-Birkenau

The Sonderkommando photographs are four blurred photographs taken secretly in August 1944 inside the Auschwitz concentration camp in German-occupied Poland.
The images were taken within 15-30 minutes of each other by an inmate inside Auschwitz-Birkenau, the extermination camp within the Auschwitz complex.
Several sources identified him as Alberto Errera, a Greek naval officer.
He took two shots from inside one of the gas chambers and two outside, shooting from the hip, unable to aim the camera with any precision. The Polish resistance smuggled the film out of the camp in a toothpaste tube.
Along with a few photographs in the Auschwitz Album, they are the only ones known to exist of events around the gas chambers.