Along with almost all of Lower Silesia , post-war Wrocław became part of Poland under the terms of the Potsdam Conference . It became the biggest city of the so-called Recovered Territories . On 24 May 1945 the surviving members of Polish pre-war minority from the Nazi German genocide in Wrocław were met by Polish authorities . Bolesław Drobner , the city 's newly appointed mayor , welcomed them in '' " Free Poland " '' and urged pre-war Poles from Wrocław to stay in the city , expressing his view that the Polish state needs people like them to awake to life after the war ; many of the addressed heeded this call , and pre-war Poles became active members of Wrocław 's political and cultural life , forming an association called " Klub Ludzi ze znakiem P " ( " People with the P sign " ) , remembering those Poles who perished under Nazi German rule in the city
Potsdam Conference
Potsdam Conference
History of Wrocław