The first written mention of the castle of Potštejn is from the late 13th century. The castle was conquered only once in history, in 1339 by Charles IV before he became king. The village below the castle was first mentioned in 1350. The golden times of the castle were after 1495, when it was bought by Vilém II of Pernštejn, who had rebuilt it.
In the 17th century, economic decline came, the castle fell into disrepair, and the entire Potštejn went bankrupt. In 1746, the estate was bought by the nobleman Jan Ludvík Harbuval Chamaré, who had built here a château. After the House of Chamaré died out in the mid-19th century, Potštejn was acquired by marriage by the Dobřenský of Dobřenice family. They owned it until 1945, when their properties were confiscated.
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.