Château de Mauvezin, occupied since protohistory, was transformed into a castrum in the Middle Ages and later into a castle. The castle was built by Gaston Fébus (also Phoebus) around 1380. Following the merging of Bigorre into the Kingdom of France in 1607, it fell into disuse and was dismantled piece by piece, its stones being used for other buildings.
Today the castle is being restored and houses a historical and folk museum of Bearn and Bigorre.
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.