It was captured again by Austria in late 1762 , during the Third Silesian War , or Seven Years ' War , but remained Prussian after the end of the war . Subsequently , it became part of the Prussian-led German Empire in 1871 during the unification of Germany and stayed within Germany until the end of World War II . In addition , the World War I flying ace Lothar von Richthofen was buried here , until the city became owned by Poland after World War II in which the graveyard was leveled . After the defeat of Nazi Germany in 1945 , the town , like most of Silesia , became again part of Poland under border changes promulgated at the Potsdam Conference . Those members of the German population who had not already fled or had been killed during the war were subsequently expelled to the remainder of Germany and the town was repopulated with Poles , many of whom had themselves been expelled from Polish areas annexed by the Soviet Union
Potsdam Conference
Potsdam Conference
Świdnica