Schloss Westerburg, first recorded in 1192, but probably built earlier, is situated in the town of Westerburg in the forested hills of the Westerwald and is on the site of an older castle dating to the 12th century. The latter belonged to the counts of Leiningen but was transferred to the House of Runkel as the result of the marriage of Siegfried III of Runkel to a daughter of the House of Leiningen in the early 13th century. In the first half of the 13th century the castle was the seat of the lords of Westerburg, who had split off from the House of Runkel by 1288 with Henry I of Westerburg.
The castle was considerably expanded and remodelled over the course of time and, for a long time was the residence of a branch of the counts of Leiningen-Westerburg. The northeast corner and the north front of the site are probably the oldest surviving sections. They include the castle chapel and probably date to the early 13th century. The building that contains the great hall was built between 1476 and 1483. The remaining parts of the site date to the 18th century when it was expanded to a schloss.
Schloss Westerburg is in private ownership and houses a restaurant, and a dental institute.
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.