At the onset of World War II , during Sonderaktion Krakau , 22 Academy professors and assistant professors were arrested by the German authorities and sent to the Sachsenhausen concentration camp . The main building was used by the German government of the occupied Polish territory . Part of the Academy however , retained its status and became the centre for underground teaching , vital for the Academy 's future
Sonderaktion Krakau
Sonderaktion Krakau
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