Brandemburgo Capital Potsdam Capital of the state of Brandenburg, adjacent to Berlin, Potsdam was the summer city of the kings of Prussia. Park Sanssouci brings together Frederick the Great's palace and the monumental Neues Palais. In the centre are the Alter Markt with the Museum Barberini, the Holländisches Viertel and the city's Brandenburger Tor. To the north are the Neuer Garten and the Glienicker Brücke, the Cold War Bridge of Spies.