The remains of the Roman public baths in Mamer have been reconstructed. During the Gallo-Roman era which lasted until about 450, the Romans built and maintained a number of roads in the area including the Kiem (Latin caminus, road) linking Trier to Reims through what is now Mamer. Mambra was a Romanvicus centred around a villa with thermal baths, sited on the banks of the Mamer River at the eastern end of today's Mamer. The Roman settlement was burnt by Germanic invaders around 276.
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.