Roland Handrick/Stiftung Preussische Schloesser und Gaerten via Bloomberg
Schloss Sanssouci in Potsdam, Germany. Sanssouci palace in Potsdam, Germany. At a ceremony there, the U.S. ambassador will return an Old Master painting that has been missing since a Red Army soldier stole it after World War II. The palace was the summer home of Frederick the Great. The Prussian king's 300th birthday celebration includes a big exhibition in the Neues Palais in Sanssouci Park.