Arnstein Abbey is a former Premonstratensian abbey on the Lahn River. The history of the monastery dates back to the second half of the 11th century. In 1052, an Arnstein Castle on the Lahn is first mentioned as the seat of the Counts of Arnstein. This is the oldest mention of any castle on the river. Nothing remains of the structures of that period.
In 1139 Louis (Ludwig) III, the last Count of Arnstein, transformed his castle into a Premonstratensian monastery and himself joined the order. His wife lived until her death as hermit near the monastery. In the same year, Lugwig began the partial demolition of the castle. In 1145, King Conrad III confirmed the abbey as directly under the Empire. From 1236, a branch monastery, Keppel Abbey at Hilchenbach, was established under the patronage of the House of Nassau.
Burials in the monastery include Count Walram I of Nassau in 1198. Walram's grandson Henry (Heinrich) (son of Count Henry II of Nassau) became a monk in Arnstein Abbey in 1247.
In 1360, the monastery church was completed. The structure includes individual components which have been dated to the 12th century.
In 1803, the monastery was dissolved during secularization and came into the possession of the Principality of Nassau-Weilburg. In 1919 the Congregation of the Sacred Hearts of Jesus and Mary established Arnstein as their first monastery in Germany. The Superior and Vice-Provincial of the monastery, Pater Alfons Spix, died in 1942 in the Dachau concentration camp, because he let the Polish forced laborers participate in worship and gave them breakfast.
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.