The Auschwitz concentration camp was established in April 1940 in the prewar Polish army barracks on the outskirts of Oświęcim. Originally intended for Polish political prisoners, the camp was 'repurposed ' as a dedicated center for the genocide of the Jews of Europe. For this purpose, the much larger camp at Birkenau (Brzezinka), also referred to as Auschwitz II, was built 2km west of the original site in 1941 and 1942, and another in Monowitz, several kilometers to the west. It is now estimated that this death factory eliminated some 1.6 million people of 27 nationalities, including 1.1 million Jews, 150,000 Poles and 23,000 Roma.Auschwitz was only partially destroyed by the fleeing Nazis, and many of the original brick buildings stand to this day as a bleak testament to the camp's history. Some 13 of the 30 surviving prison blocks now house museum exhibitions, either general or dedicated to victims from particular countries or races that lost citizens at Auschwitz.