It is the largest complex in the National Socialist concentration camp system. In total, more than 1.1 million people were murdered there between 1940 and 1945.
End of April 1940: construction of the first camp
October 1941: start, on instructions from Himmler, of work on a second sector in the locality of Birkenau or Auschwitz II
From 1942: Birkenau grows and becomes the largest of the concentration camps and the largest murder center. Development of the Buna labor camp, later named Monowitz/Auschwitz III
March and June 1943: commissioning of crematoria II to V, with their large capacity gas chambers
Fall 1944: preparation for site evacuation. End of the systematic mass murder in the gas chambers at the end of November
January 27, 1945: discovery of Auschwitz by the Red Army. Death marches to other concentration camps until May 1945.