Schloss Wilhelmshöhe is a Neoclassical palace located in, a part of Kassel, Germany. It was built for Landgrave Wilhelm IX of Hesse in the late 18th century. Emperor Wilhelm II made extensive use of it as a summer residence and personal retreat.
Today, the palace houses the art gallery Gemäldegalerie Alte Meister, part of . Since 2013, Schloss Wilhelmshöhe has been part of the UNESCO World Heritage Site Bergpark Wilhelmshöhe.