In the early XVII century Landgrave of Hesse-Kassel Moritz ordered to construct a building for the theater, the first in Germany. So the Ottoneum appeared. But it was a theater a short time: at the end of the century Ottoneum turned into a repository of relics and later lessons in Latin were given here. Since 1885 it is a Museum of Natural History.
The Ottoneum houses archaeological finds of Northern Hesse: botanical, zoological, geological collections, including those collected by Landgrave Wilhelm IV in the XVI century, as well as aquariums. The most popular exhibits are "Goethe's Elephant Skeleton" and "Ratzenberger Herbarium." The first exhibit is a real elephant skull, which was given to Johann Goethe for experiments - the poet was also a naturalist; the second exhibit is the oldest herbarium in Europe of the XVI century. Natural History.