Rosenborg Castle is not only a beautiful historic building, it is also a fascinating museum of cultural history which houses some of Denmark’s greatest cultural treasures, not least the Crown Jewels and the Danish Crown Regalia. The museum tells the history of the Danish kings through 300 years, from Frederik II in the late 16th century to Frederik VII in the 19th century; the history of the kings since then feature in the Amalienborg Museum.