Frýdlant castle complex consists of the Gothic castle with a high tower and a Renaissance château. There are exhibits, such as of Albrecht von Wallenstein, the Thirty Years' War, and an armoury of 1,000 weapons used for military and hunting. The castle includes the Chapel of Saint Anne, the Knights' Hall, rooms for the count and countess, and a working kitchen.
In the 13th century the castle was held by the Ronovci family until the middle of the century when Častolov of Ronov was forced to return the castle and other properties to King Ottokar II. The first written mention of Frýdlant is from 1278, when Rudolf of Bieberstein, purchased the castle and surrounding land from the king.
Frydlant castle and town went to Emperor Ferdinand I when Christopher, the last of the line of the Birbsteins, died in 1551. The castle went into the Redern family when Bedřich bought it in 1558. Several new villages were established and the production of linen cloth resulted in an economic boom during the initial years of the Redern family. Marco Spazzio di Lancio, an Italian architect hired by the family, expanded the castle in the 16th century.
At the end of the Thirty Years' War, the castle was possessed by the Swedes. They constructed fortified barbicans and strengthened the defensive walls.
In 1800 or 1801, the Clam-Gallas family opened the castle to the public as a museum.
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.