The concentration camp in Bretstein was an external camp of the concentration camp in Mauthausen located in Upper Austria, which directed about more than 50 external camps.
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KZ – Nebenlager Bretstein was a concentration camp in Bretstein (located near Judenburg, in the upper part of Styria) was associated with the SS-own operation Deutsche Versuchsanstalt für Ernährung und Verpflegung GmbH, which administrated three working farms in Bretstein since 1939.