Witold Pilecki, a Polish soldier,volunteered to be imprisoned in Auschwitz in order to gather information, escape and let the world know about the Holocaust.
The only Jewish descendants spared by the Nazis where those with grandparents who converted to Christianity before the founding of the German Empire (1871).
During the Holocaust, Jewish boxer Salamo Arouch was imprisoned at Auschwitz. He was forced to fight fellow prisoners; the losers were sent to the gas chambers or shot. He survived over 2 years and 200 fights until the camp was liberated.