Bellevue Palace - Credit: Wikimedia Commons
Bellevue Palace (German: Palais Bellevue or Schloss Bellevue) in Kassel was built in 1714 for Charles I, Landgrave of Hesse-Kassel. Originally the building served as an Observatory. It became a residence, and then part of Bellevue Castle, which was later destroyed. Until its closure for structural reasons in 2009, the building housed a museum devoted to the Grimm Brothers, which has now moved to the Grimmwelt Kassel. Read more on Wikipedia
Source: en.wikipedia.org