Babelsberg Palace (German: Schloss Babelsberg) lies in the eponymous park and quarter of Potsdam, the capital of the German state of Brandenburg, near Berlin. For over 50 years it was the summer residence of Prince William, later German Emperor William I and King of Prussia and his wife, Augusta of the House of Saxe-Weimar-Eisenach, German Empress and Queen of Prussia. Along with the surrounding park and other parks in the area, the Babelsberg Palace was inscribed on the UNESCO World Heritage list in 1990 for its architectural cohesion and its testimony to the power of the Prussian monarchy.