Baldenau Castle was built by the Trier Elector and Archbishop Balduin of Luxemburg around the year 1320. Initially designed as a hunting lodge, it was later on, beginning in 1324, completed to a residential seat through the construction of additional buildings, stables, and barns. The principal Balduin who initiated the building and gave it his name, was born in 1285 as the youngest son of Count Henry VI. of Luxemburg.
The most impressive part of castle is the keep, 25m height and 10m width. The surrounding moat is 12m wide. During the Thirty Years' War (1618-1648), Baldenau Castle was seriously damaged by Swedish troops, but reconstructed throughout the years 1649-1654. However, only 35 years later, in 1689, the French army devastated the castle.
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.