Just a little bit of history about Mauthausen Concentration Camp:
They were brought to the rock quarry there, known as the "Wiener Graben", where they began to build the granite fortress-prison of the main camp, mostly with their blood, bodies, bare hands and backs. It was known as the “mother camp” for all of Austria, comprising some 49 sub-camps. Between Aug. 8, 1938 and May 5, 1945, about 195, 000 persons, men and women, were forced into these camps. Most of the people were imprisoned under the Nazi “protective custody” laws, that is, they were considered dangerous to the Third Reich of Germany and Austria, and therefore, these two nations, now joined, had to be “protected” from these people because of their racial origin, nationality, political affiliation or religious belief. It should be noted that Austria contributed more volunteers for the SS, per capita , than did Germany.
The Czechoslovakian Memorial