Konzentrationslager Flossenbürg was a Nazi concentration camp built in May 1938 by the Schutzstaffel (SS) Economic-Administrative Main Office at Flossenbürg, in the Upper Palatinate region of Bavaria, Germany, near the border with Czechoslovakia. Until its liberation in April 1945, more than 96,000 prisoners passed through the camp. About 30,000 died there.