Ozalj Castle, located on the stone cliff perched above the Kupa River, is one of the best-known fortifications of this type in Croatia. It is a very old stronghold (first mentioned in 1244) that has been converted into a castle. The popularity of this castle is because this was the joint castle of the Croatian noble families of Frankopan and Zrinski. In fact, it was the scene of the unlucky Zrinski–Frankopan conspiracy, which significantly marked the history of Croatia. In the castle there is a museum and a library, and it is in a relatively good state of repair.
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.