the  Reich . An estimated 30,000 Poles died at  Mauthausen-Gusen ; 150 000 at  Auschwitz , 20,000 each at  Sachsenhausen  and  Gross-Rosen ; 17,000 at  Neuengamme and 10,000 at  Dachau . About 17,000 Polish women died at  Ravensbrück . A major concentration camp complex at  Stutthof , east of  Gda?sk ,