The Museum of the Greenhouse traces its origins back to Elector Wilhelm II of Hesse-Kassel, who built this large greenhouse in 1822 AD, to house a collection of his own plants. Later, it was expanded into a large rectangular central building that still impresses today with its iron and glass construction. It is one of the oldest buildings of its kind in Germany, and is considered an important attraction for visitors in winter, when they can come to see a paradise of roses and green plants, and they can He took some distinctive seedlings so that they could be planted later.