Blumenstein Castle is a castle ruin in the Palatinate Forest probably constructed in the first half of the 13th century as part of a line of defensive castles along the Alsatian border. The castle was first mentioned in 1332 in connection with knight Anselm from Batzendorf near Blumenstein. After a feud with the House of Fleckenstein in 1347, the knight was banished from the castle.
About 1350, the counts of Zweibrücken had one quarter of the castle, the House of Dahn owned the rest. Blumenstein castle was probably destroyed in the German Peasants' War in 1525. The ruin passed from the counts of Hanau-Lichtenberg to the landgraves of Hesse, then to the bishopric of Speyer and finally to the state of Rheinland-Pfalz.
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.