After the capitulation of Nazi Germany in 1945 , the town was placed under Polish administration according to the Potsdam Conference . Since then it remains as part of Poland . The German inhabitants of the town were expelled . New Polish settlers came to re-settle the town and justify its new belonging to Poland . 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 came from war-devastated central Poland . In May 1945 Czechoslovakia tried to annex the area on behalf of Czech minority ( living especially in the western part of the land , called " Czech Corner " ) and historical claims , but on pressure of Soviet union ceased military operations and Czech minority was expelled to Germany and Czechoslovakia . In the 1950s and 1960s much of the town centre was damaged by landslides . It turned out that throughout the city 's history , generations of Kłodzko 's merchants had developed an extensive net of underground basements and tunnels . They were used for storage and , in times of trouble , as a safe shelter from artillery fire . With time the tunnels were forgotten , especially after the original German population was deported , and during the years after World War II many of them started to collapse , along with the houses above . Since the 1970s the tunnels were conserved and the destruction of the city was stopped . Another disaster happened in 1997 , when the city was damaged by flooding even greater than that of 1938 . However , the town quickly recovered
Potsdam Conference
Potsdam Conference
Kłodzko