The Auschwitz-Birkenau State Museum (Polish: Państwowe Muzeum Auschwitz-Birkenau) is a museum on the site of the Nazi German Auschwitz concentration camp in Oświęcim, Poland. The site includes the main concentration camp at Auschwitz I and the remains of the concentration and extermination camp at Auschwitz II-Birkenau. Both were developed and run by Nazi Germany during its occupation of Poland in 1939–1945.