Haamstede Castle (Slot Haamstede) was built originally in the 12th century and it probably consisted of a wooden keep on a motte, circled by a moat. There is also archeological evidence of Roman habitation on this site. Around 1200 this castle came into the possession of Floris IV, Count of Holland. In 1229 the castle went to the Lords of Zierikzee through an exchange with Floris IV. The new inhabitants of the castle called themselves Van Haamstede.
The castle was destroyed by fire in 1525. Only the keep, built in the 13th century, survived. The other castle was rebuilt in the 17th century. The keep was provided with 2 square towers on both sides. The smallest one served as a stair tower. During the 19th and 20th century the castle was renovated twice until it got its present appearance.
At present Haamstede Castle is owned by the Vereniging Natuurmonumenten, a society for the preservation of nature monuments in the Netherlands.
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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.