The Wilhelmshöhe Palace (Schloss Wilhelmshöhe) sits at the foot of the Bergpark on axis with the Herkules and the long line of cascades that connects them. The neoclassical building, completed in 1798, is the city's main art museum, holding the Gemäldegalerie Alte Meister — one of the most important Old Master collections in Germany.
Star pieces include works by Rembrandt (a major group, including the famous Saskia), Rubens, Hals, Van Dyck, Dürer, Cranach, and Titian. The Antikensammlung in the same building shows Greek and Roman antiquities. The palace and its garden are the heart of any visit to the park; allow at least half a day if you intend to do the picture gallery seriously.