The Fort Bokar, often called Zvjezdan, is considered to be amongst the most beautiful instances of harmonious and functional fortification architecture. Built as a two-story casemate fortress by Michelozzo from 1461 to 1463, while the city walls were being reconstructed, it stands in front of the medieval wall face protruding into space almost with its whole cylindrical volume. It was conceived as the key point in the defense of the Pila Gate, the western fortified entrance of the city; and after the Minčeta Tower, it is the second key point in the defense of the western land approach to the city.
Bokar is said to be the oldest casemented fortress in Europe, which contains a small lapidary collection and numerous cannons.
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.