After the war the ruined town was placed under Polish administration by decision of the Potsdam Conference ; Germans remaining in the town were subsequently expelled westward . New Polish settlers took the place of the former German inhabitants . Some of the new inhabitants were Polish refugees from regions east of the Curzon line , the Kresy , from where they had been displaced by Soviet authorities in accordance to new borders decided at Yalta Conference , while most new settlers were re-settlers from Central Poland
Yalta Conference
Yalta Conference
Kostrzyn nad Odrą