Burg Metternich was mentioned in documents first time 1268, when it was owned by Johann von Braunshorn. It is thought the castle is even older, with some historians indicating 1129 as the year of construction. Until the first half of 17th century, the castle was owned by Counts von Nassau-Dillenburg.
The castle was not damaged badly before 1689, when French army destroyed the castle during the Nine Years' War. It was never completely rebuilt.
The last member of the family to own the castle was Klemens von Metternich, one of the most famous diplomats of the Austrian Empire – he was foreign minister from 1809 to 1848.
Today there is a hotel and restaurant.
References:Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.