The Roman walls of Astorga were built at the end of the 3rd century AD or beginning of the next century. The reasons that caused its construction are related to a period of instability experienced in the last years of the Roman Empire, especially originated by the incursions of the barbarian towns from the center of Europe. The walls has a length of 2,2 km.
At the end of the thirteenth century, repairs were documented by the hand of Bishop Nuño, who is credited with an important building task in the city of Astorga. However, we do not know the scope of these contributions, which may have significantly altered the appearance of Roman fortification.
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.