"in a small camp near Cracow"
This seems to refer to Płaszów, a forced labour camp established on the grounds of Jewish cemeteries in 1942.  After the liquidation of the Krakow Ghetto in 1943, it became a concentration camp.  This was depicted in the film ‘Schindler’s List’, alongside Ralph Fiennes' chilling portrayal of the camp commander, Amon Göth.  A Viennese SS officer, he was notoriously sadistic and took pleasure in killing prisoners at random.  Several well known female guards worked at Płaszów, and helped oversee the final death march to Auschwitz in January 1945.  By the time the Soviet Army reached the site, it had been completely abandoned.  The area where the camp stood is now a memorial to the thousands of people who died there. 
Płaszów Memorial
Creative Commons Attribution Share AlikePłaszów Memorial - Credit: Pumpkinheart