The Château de Vaudémont is a ruined 11th-century castle. At its greatest extent the castle measures about 500 by 250 metres.
The castle is one of a group of four castles built around the same time on highland sites along the Moselle valley between Nancy and Metz in northeast France. The other three castles are Dieulouard, Mousson, and Prény; of the four, Château de Vaudémont is the largest and best preserved. It was built as a hill castle in the 11th century for the Counts of Vaudémont, possibly for Gérard I (1071 – c.1120). The architect is unknown. The remains are part of the curtain wall and the keep, the so-called tour Brunehaut (Brunehaut tower) constructed with recycled Gallo-Roman remains. It was repaired during the 15th century, dismantled in 1639 on the orders of Louis XIII, and restored in 1930.
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.