Granitwerke Mauthausen
Granitwerke Mauthausen (Mauthausen Granite Works) was one of the names used by the DEST company (Deutsche Erd- und Steinwerke) for its branch based in Sankt Georgen an der Gusen and which exploited the slave manpower confined in certain subcamps of the Mauthausen-Gusen concentration camp system: Gusen I, Gusen II, Gusen III, and Mauthausen. The quarries of Mauthausen-Gusen concentration camp, the same as all of the others that were managed by Granitwerke Mauthausen, were notorious for the terrible working conditions, which claimed thousands of lives.