Schloss Köpenick is a Baroque water palace of the Hohenzollern electors of Brandenburg which stands on an island in the Dahme River surrounded by an English-style park and gives its name to Köpenick, a district of Berlin. The castle was originally built on the foundations of a Slavic castle (6th century) in 1558 as a hunting lodge by order of Elector Joachim II Hector of Brandenburg. The building in a Renaissance style was located on the river island at the site of the former medieval fort. Today the castle surrounded by a small park serves as the Museum of Decorative Arts, run by the Prussian Cultural Heritage Foundation as part of the Berlin State Museums.