As the main defense of the crossing of the Alto Minho river to Galicia, The Castle of Melgaço constitutes the most northern sentry point in Portugal from the twelfth century.
The construction of the castle dates back to 1170 by order of the first King of Portugal Afonso Henriques (1112–1185). He granted a Foral charter to the town at the same time, encouraging the development of the town.
Afonso III (1248–1279) granted to the village in 1258 a second Foral Charter, promising privileges to the town.
In 1361 the traffic between Portugal and Galicia was required to pass through Melgaço demonstrating its importance at the time.
In the context of the 1383-1385 Portuguese succession crisis, the village and its castle followed the northern region of Portugal by expressing loyalty to Beatriz. It fell into Spanish hands but in early 1387, then governed by a Spanish mayor, the town suffered the harassment of the Portuguese troops under the command of John I (1385–1433), resisting their take over for nearly two months.
In 1492, Melgaço was one of only five places along the Spanish-Portuguese border where the Sephardic Jews expelled from Spain could enter Portugal. Still under the reign of King Manuel I, village defenses and its castle layout are figured in the Duarte de Armas, made up of three towers and two gates.
The castle has plant in circular shape, unusual in the country, divided into three precincts. The walls, where they tear two doors are surmounted by prismatic battlements and reinforced by three towers, the main one being that is focused on the urban core, pentagonal section. The set is dominated by the keep. The keep has a square shaped plan, isolated in the center of the parade ground. Both she and the surrounding wall were fully rebuilt, inferring to its Romanesque feature only the design of this set: a solid square tower isolated in the center of the walled enclosure. The tower is divided internally into three floors, illuminated by some chinks. The crown is made by a shot in counter with battlements, now reclassified as lookout of the archaeological museum established in the tower dependencies.
Regarding the doors, they are two: the main gate to the west, larger, go to the square of weapons, which opens a cistern, where he would find the commander's residence; and the betrayal door to the north, smaller. They remain part of the Barbican on the main door and towers that flanked one of the doors of the fence. Thanks to recent archaeological research, which laid bare significant stretches of gothic fence, we can now make the idea of the original design.
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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.