Mauthausen concentration camp in Upper Austria was one of the biggest in the Third Reich - with more than 200,000 prisoners, mainly Soviet PoWs, Jews and political prisoners. About 100,000 people died there between 1938 and 1945. Among the 500 Roma victims was the father of Karl Stojka, who was one of the fi rst Roma to be deported to the camp in 1939. In 1994 Karl Stojka unveiled a memorial plaque on the site of the former concentration camp.