Monowitz (also known as Monowitz-Buna, Buna and Auschwitz III) was a Nazi concentration camp and labor camp (Arbeitslager) run by Nazi Germany in occupied Poland from 1942–1945, during World War II and the Holocaust. For most of its existence, Monowitz was a subcamp of the Auschwitz concentration camp; from November 1943 it and other Nazi subcamps in the area were jointly known as "Auschwitz III-subcamps" (KL Auschwitz III-Aussenlager). In November 1944 the Germans renamed it Monowitz concentration camp, after the village of Monowice (German: Monowitz) where it was built, in the annexed portion of Poland. SS Hauptsturmführer (Captain) Heinrich Schwarz was commandant from November 1943 to January 1945.