Château de Hohenack is a ruined castle in the municipality of Labaroche. Significant building periods were the last quarter of the 12th century, the 13th, 15th and 16th centuries. In plan view, the edifice is typical of the 12th century, constituting a polygonal curtain wall and a square keep. The castle served both military and administrative functions before being destroyed in 1655 on the orders of the King of France. During the French Revolution, the ruin was sold as national property and, until 1898, it was treated as a quarry. The castle has suffered war damage.
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.