The Ottoneum in Kassel, Germany was the first theater building built in Germany and is now a museum of natural history.
Ottoneum
Jean Paul du Ry was a French architect and Huguenot refugee who was responsible for a number of baroque buildings in Kassel, Hesse, Germany.
Karlskirche after restoration
Bellevue Palace in 1742, used as an observatory by Johann Gabriel Doppelmayr