Auschwitz concentration camp (German: Konzentrationslager Auschwitz, pronounced [kɔntsɛntʁaˈtsi̯oːnsˌlaːɡɐ ˈʔaʊʃvɪts] ( listen), also KZ Auschwitz or KL Auschwitz) was a network of German Nazi concentration camps and extermination camps built and operated by Nazi Germany in annexed Polish areas during World War II. It consisted of Auschwitz I (the original camp), Auschwitz II–Birkenau (a combination concentration/extermination camp), Auschwitz III–Monowitz (a labor camp to staff an IG Farben factory), and 45 satellite camps.