Teufelsburg is a castle ruin in Felsberg in the community of Überherrn, Saarland. It lies to the west of Saarlouis on the edge of the middle Saartal. The castle is north of Felsberg and is easily reached from Upper Felsberg as well as via the Vauban-Steig, a designated premium hiking path. The castle offers its visitors a sweeping overview of the Saartal and the Hunsrück.
Following the destruction of the Altenfelsberg Castle in 1341 by the electoral prince and archbishop Baldwin of Luxembourg, Duke Johann I of Lorraine built this spur castle from 1354 to 1360. The first documented reference to the castle dates to 1370, and the first knight of Neufelsberg Castle was Arnold von Filsberg - a grandson of Arnold von der Brücke, Lord of Siersburg and Felsberg. The final historical reference to the castle occurs in 1699 when it was already in ruins and no longer inhabited. The stones from the castle were used in 1680 by the French for the building of the fortified city of Saarlouis.
The ruins are made up of the remnants of two castles – an upper, older castle and a lower castle. Following a complete measurement of the castle grounds by Bernd Richter, a model of the lower castle was created that ultimately led to the site's excavation and the lower castle's rebuilding in 1968 according to the existing foundations with a restoration that lasted from 2009 to 2010. By contrast, after being plundered for stones in 1680, the upper castle was never restored.
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.