The yellow glowing facade of the Orangery Palace in the Karlsaue with its two corner pavilions is visible from afar. The Orangery was built in the early 18th century by Landgrave Carl. Numerous orange and laurel trees overwintered in the central building. Landgrave Carl and his wife used the two corner pavilions - the kitchen pavilion and the marble bath - as well as the central Apollo Hall as a summer residence and for festivities. In the 1760s, his grandson Landgrave Friedrich observed the movements of the moon and planets with telescopes on the roofs of the Orangery. Today, Hesse's largest... Planetarium discover.

Originally, a permanent exhibition of the collection of the Astronomical-Physical Cabinet was housed in the Orangery. Due to necessary renovations of the building, the museum area is currently closed, and the exhibition can be seen in small special presentations at the Hessian State Museum.