Schloss Charlottenburg, or the Charlottenburg Palace, is the oldest surviving Prussian palace in Germany. Building began in 1695 and was completed in 1790. There are 70 rooms and corridors crammed full of ornate furnishings and Watteau paintings. The East Wing houses an incredible collection of romanticist paintings, while the West Wing houses a collection of ancient and prehistoric art and artifacts. Take a guided tour of the royal apartments, and then stroll through the formal gardens that surround the palace.