Flossenbürg was a Nazi concentration camp built in May 1938 by the SS Main Economic and Administrative Office. Unlike other concentration camps, it was located in a remote area, in the Fichtel Mountains of Bavaria, adjacent to the town of Flossenbürg and near the German border with Czechoslovakia. The camp's initial purpose was to exploit the forced labor of prisoners for the production of granite for Nazi architecture. In 1943, the bulk of prisoners switched to producing Messerschmitt Bf 109 fighter planes and other armaments for Germany's war effort. Although originally intended for "criminal" and "asocial" prisoners, after Germany's invasion of the Soviet Union, the camp's numbers swelled with political prisoners from outside Germany. It also developed an extensive subcamp system that eventually outgrew the main camp.
Before it was liberated by the United States Army in April 1945, 89,964 to 100,000 prisoners passed through Flossenbürg and its subcamps. Around 30,000 died from malnutrition, overwork, executions, or during the death marches. Some of those responsible for these deaths, including administrators, guards, and others, were tried and convicted in the Flossenbürg trial. The camp was repurposed for other uses before the opening of a memorial and museum in 2007.
During the first half of 1938, the Nazi concentration camp population expanded threefold due to increased arrests by the Schutzstaffel (SS) of individuals deemed undesirable, especially "asocial" and "criminal" prisoners, to create a slave labor force. SS leader Heinrich Himmler ordered the founding of new concentration camps to expand the SS economic empire. The SS intended to exploit the slave labor of prisoners to quarry granite, which was in high demand for monumental building projects in the Nazi style. This would also profit the SS-owned and -operated company German Earth and Stone Works (DEST), which had been founded in April.
During the second half of March 1938, a high-ranking SS commission led by Oswald Pohl and Theodor Eicke toured southern Germany, searching for a site for a new camp that would meet the SS' specifications.