The Château de Dreistein is a ruined castle in the commune of Ottrott. It is, in fact, three separate castles built on rocky promontories, hence the name drei Stein, 'three stones' in medieval German. It was built in the 13th or 14th centuries and was separated into two sections later. In the 17th century it was destroyed.
The castle is sited on the massif of Mont Sainte-Odile, to the west of the abbey. It overlooks the valley of the Ehn which it controls along with the castles of Koepfel, Rathsamhausen and Lutzelbourg and the Château du Hagelschloss. As with the latter, it is close to the Pagan Wall of Mont Sainte-Odile.
In common with all the neighbouring castles of its time, the castles at Dreistein are constructed from pink sandstone from the Vosges. The remnants of the two castles are separated by a ditch. The western castle is flanked by a half open staircase tower.
Access to Dreistein is only possible on foot, following paths laid out by the Vosges Club.
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.