Horneck castle was built around 1200 and was given to the Teutonic Order by Konrad von Horneck in 1438, thereby making it the seat of the 'Deutschmeister' (German Master) until it was destroyed in 1525 by fire during the German Peasants' War. Despite reconstruction shortly after Horneck Castle's destruction, Mergentheim became the new headquarters for the Teutonic Order in that region in 1527.
As of 2006, the castle was occupied by an altenheim (a nursing home for the elderly) as well as the Transylvanian Museum (dedicated to the protection, preservation and documentation of the cultural heritage of the Transylvanian Saxons and of their coexistence).
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.