DEST, founded on April 29, 1938, in Berlin, was administered by the VWHA for the purpose of procuring building materials and organizing slave labor and overseeing quarry operations. The Sachsenhausen (1936), Buchenwald (1937), Flossenbürg (1938), Mauthausen (1938), Natzweiler-Struthof (1939), Gross Rosen (1940) and Neuengamme (1940) concentration camp sites were chosen because of their proximity to soil suitable for making bricks, or due to the close proximity of a brickworks factory or stone quarry.