The Nazi death camps in chronological order are: Chelmno, Belzec, Sobibor, Treblinka, Majdanek and Auschwitz-Birkenau. In 1941 the Chelmno camp was opened in Poland, soon followed in 1942 were Belzec, Sobibor, and Treblinka. The largest death camp was opened in 1943 and was known as Auschwitz-Birkenau,