Auschwitz-Birkenau State Museum (Poland)
Auschwitz concentration camp was a network of German Nazi concentration camps and extermination camps built and operated by the Third Reich in Polish areas annexed by Nazi Germany during World War II. It consisted of Auschwitz I, Auschwitz II–Birkenau, Auschwitz III–Monowitz, and 45 satellite camps.
Auschwitz I was first constructed to hold Polish political prisoners, who began to arrive in May 1940. The first extermination of prisoners took place in September 1941, and Auschwitz II–Birkenau went on to become a major site of the Nazi Final Solution to the Jewish Question. From early 1942 until late 1944, transport trains delivered Jews to the camp’s gas chambers from all over German-occupied Europe, where they were killed en masse with the pesticide Zyklon B.