Trebnje Castle dates from year the 13th century and was first mentioned in written sources in 1386. The original owners were the lords of Trebnje from Carinthia, while it was later run by the Ortenbuger, the Counts of Celje, the Hapsburgs and others, and was from 1812 to 1824 owned even by the local missionary Frederic Irenaeus Baraga.
The castle retained many ancient sections – a square tower with Roman foundations, a round tower from the time of the Ottoman Wars – and was completed to the way it is today in the 16th century. A stone lion from Roman times reigns on top of the castle stairs. The castle was extended in the 17th and 18th century. It owes its current look to a 19th-century remodelling in the historicist style.
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.