With most of Silesia , Friedeberg was annexed by Prussia in 1742 and incorporated into the Silesia Province . After World War II , the border changes demanded by the Soviet Union at the Potsdam Conference placed the town in Polish territory . German names , 1201-1945 : '' Eulendorf '' , '' Fridberg '' , '' Friedeberg '' ; '' Friedeberg am Queis '' to distinguish it from Brandenburgian Friedeberg ( Strzelce Krajeńskie ) , '' Friedeberg/Isergebirge '' from 1934 ; for a short period after World War II literally translated as meaning " peaceful mountain " . The present name , adopted in 1947 , is derived from the Polish word " mir " , translated as " peace "
Potsdam Conference
Potsdam Conference
Mirsk