Alongside Wilhelmshöhe Castle, Löwenburg Castle, which is one of the most important examples of Neo-Gothic ruin architecture on the continent, emerged (1793-1801) under William IX and houses valuable furnishings from the Medieval, Early Modern and Romantic period.
Löwenburg Castle is picturesquely situated in Wilhelmshöhe Mountain Park. From afar, it appears to the visitor like a romantic knight's castle from the Middle Ages. However, it was built between 1793 and 1801. Conceived as a pseudo-medieval "ancestral castle" by its builder, Landgrave William IX of Hesse-Kassel, later Elector William I, the court builder Heinrich Christoph Jussov put the construction of the daring plans into practice.
Löwenburg Castle did not serve as a fortress, but as a pleasure palace. Thus, inside the castle, royal apartments are to be found which are extensively furnished with historical furniture, paintings, tapestries, glassware, bronze sculptures, a magnificent collection of weaponry and medieval glass windows, reflecting the builder's great passion for collecting. In a guided tour, it is possible to visit the men's and women's quarters, as well as the armoury containing weapons and suits of armour from the 16th and 17th century and the castle chapel.