During World War II about 70 % of the town 's buildings were destroyed . In 1945 between the days of 8 – 10 February Red Army soldiers mass-murdered 150 German pensioners in an old-people 's home and 500 psychiatric hospital patients in Lubin . As a result of border changes promulgated at the 1945 Potsdam Conference , the town , lying east of the Oder-Neisse line , became a part of the Republic of Poland . The totality of the town 's population , being German , was either expelled , or prohibited from returning home by the new Polish Authorities
Potsdam Conference
Potsdam Conference
Lubin