The history of the Czchów Castle dates back to the 13th century, when a Romanesque watchtower was built here. In the 14th century, a defensive castle was added to the tower. It became the residence of the Czchów starostas, and was destroyed in the Swedish wars of the mid-17th century. Finally, the castle lost its military importance, and was turned into a prison, which was closed in 1772, after the first partition of Poland. Currently, the only remaining parts of the complex are a 14th-century tower and foundations of the defensive wall.
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.