The Château de Frauenberg dates from 1350 and occupies a site dominating a valley between France and Germany. It was owned by several families, including the lords of Sierck and the counts of Eberstein. Over time, it was altered and renovated, with significant construction in the 13th, 14th, 17th and 18th centuries.
It had been dismantled by Cardinal Richelieu in 1634 and was partly destroyed by fire in 1786. On the eve of the French Revolution, the land was bought by Count Gravier de Vergennes (1719-1787), minister of Louis XVI. The castle housed two pottery kilns which operated in Frauenberg from 1785 to 1791 and were the origin of the notable ceramics company, Villeroy & Boch.
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.