Wilhelmshöhe Castle was rebuilt between 1786 and 1798, according to the designs of the architects S.L. du Ry and H. Chr. Jussov, as the residence of Landgrave Wilhelm IX, later Elector Wilhelm I, in the classical style.
Since the destruction of the Second World War, only the Weissenstein Wing has the original arrangement of rooms and furnishings that are counted amongst the most significant examples of art around 1800.
Classical wall and ceiling stucco work, furniture in the Louis XVI and Empire style and marble sculptures based on ancient originals clearly indicate the changed taste of the noble owners, with respect to the baroque period.
The elegant simplicity of many residential apartments testifies to the transformation of a royal residence into a more private space in the late 18th and early 19th century, when the rigid court ceremonies of the age of absolutism, focussed on the public representation of ruling power, had lost their significance.