and academics included Sonderaktion Krakau and the massacre of Lwów professors. The Nazis also persecuted the Catholic Church in Poland and other, smaller religions. Nazi policy towards the Church was at its most severe in the territories it annexed to Greater Germany, where they set about systematically dismantling the Church – arresting its leaders, exiling its clergymen, closing its churches, monasteries and convents. Many clergymen and nuns were murdered or sent to concentration and labor camps. Already in 1939, 80% of the Catholic clergy of the Warthegau region had been deported to concentration camps. Primate of Poland, Cardinal August Hlond, submitted an official account of the persecutions of the Polish Church to the Vatican. In his final observations for Pope Pius XII, Hlond wrote: "Hitlerism aims at the systematic and total destruction of the Catholic Church in the... territories of Poland which have been incorporated into the Reich...". The smaller Evangelical churches of Poland also suffered. The entirety of the Protestant clergy of the Cieszyn region of Silesia were arrested and deported to concentration camps at Mauthausen, Buchenwald, Dachau and Oranienburg. Protestant clergy leaders who perished in those purges included charity activist Karol Kulisz, theology professor Edmund Bursche, and Bishop of the Evangelical Church of the Augsburg Confession in Poland, Juliusz Bursche. Germanization In the territories annexed to Nazi Germany, in particular with regards to the westernmost incorporated territories—the so-called Wartheland— the Nazis aimed for a complete "Germanization", i.e. full cultural, political, economic and social assimilation. The Polish language was forbidden to be taught even in elementary schools; landmarks from streets to cities were renamed en masse (Łódź became Litzmannstadt, and so on). All manner of Polish enterprises, up to small shops, were taken over, with prior owners rarely compensated. Signs posted in public places prohibited non-Germans from entering these places warning: "Entrance is forbidden to Poles, Jews, and dogs.", or Nur für Deutsche ("Only for Germans"), commonly found on many public utilities and places such as trams, parks, cafes, cinemas, theaters, and others. The Nazis kept an eye out for Polish children who possessed Nordic racial characteristics. An estimated total of 50,000 children, majority taken from orphanages and foster homes in the annexed lands, but some separated from their parents, were taken into a special Germanization program. Polish women deported to Germany as forced labourers and who bore children were a common victim of this policy, with their infants