Mauthausenthe main concentration camp for Austria located near an abandoned stone quarry.
It was created shortly after the Anschluss of Austria in March 1938 to handle criminal and "asocial elements." It later became a penal camp and was known for its harsh treatment of prisoners. Inmates were forced as punishment to carry heavy stone blocks up 186 steps from the camp quarry. This stairway became known as the "Stairway of Death." Mauthausen had over 60 sub-camps.
Source: Encyclopedia of the Holocaust.