Detail of a sculpture at the International Monument

The triangles in this sculpture show the colors of badges worn by the inmates. The Jews wore a yellow triangle combined with a red or blue triangle to form a star. Red was for political prisoners and blue was for foreign workers in the camps. Purple was for the Jehovah's Witnesses. A bar over the triangle meant that the prisoner had been released and was then arrested and brought to the camp for the second time. A red dot meant that the prisoner had been assigned to the punishment barracks.