Homosexuals, who were sent to a concentrationcamp for violating Nazi laws, were required to wear a pink clothtriangle sewn to the front of their shirt to identify them tothe SS guards. Jehovah's Witnesses, who were put into concentrationcamps because they refused to serve in the German Army or becausethey were distributing pamphlets against the Nazi government,had to wear a purple triangle. Blue triangles were for slave laborersbrought to the camp from German occupied countries. Yellow trianglesdesignated Jewish prisoners and red represented political dissidents.Two cloth triangles of different colors, such as red with yellowor blue with yellow, with one sewn on top of the other to forma six pointed star, identified Jewish prisoners. Not shown onthis artwork are the black triangles which were assigned to Communists,Socialists, Gypsies and asocials, or the green triangles whichwere for common criminals who were sent to Dachau after completingtheir regular prison sentence. This information is from the Museumexhibit at the Memorial site. During the liberation of the camp,all the prisoners were set free, including the common criminals.