Montemayor del Río Castle probably doesn't date back to before the 15th century, and has more the character of a palace than of a strength. It has two existing enclosures. From the outer one only the entrance, flanked by two turrets, remains. The inner has an irregular groundplan, adapted to the outline of the land it was build on.
In the interior two floor levels can still be traced which were arranged around a central patio. In the left wall a large chimney is conserved, evidence of habitation.
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.