sentences:  Between 1933 and 1937, Jews of Upper Silesia enjoyed somewhat less legal persecution compared to Jews in other parts of Germany, thanks to the Polish-German Treaty of Protection of Minorities' Rights in Upper Silesia.This regional exception was granted thanks to the Bernheim petition that Gliwice citizen Franz Bernheim filed against Nazi Germany in front of the League of Nations.Only 25 Jews of the pre-war population lived through the war in the city, all of them being in mixed marriages with gentiles.