Now a tourist attraction, this Berlin castle was built in 1695 as a summer residence for Friedrich I and Queen Sophia-Charlotte, this is the largest surviving Hohenzollern Palace. The huge gardens are a particular draw, with a Belvedere teahouse built in 1788. The Palace itself is vast, and various combination entrance tickets can be purchased: save yourself a headache and go for the combined ticket. Much of the Old Palace is classically traditional, dripping with silver and porcelain. Of more interest is the New Wing of the state apartments of Frederick the Great. A collector of 18th-century French art, he accumulated many impressive works. The Stüler Bau Pavilion can also be found in the castle grounds and houses the Sammlung Berggruen, with a collection of works by Picasso, Cézanne, Van Gogh and Klee.