Although the origins of Alcázar de Toro castle date back to the 10th century, its current construction dates from the 15th century. Witness of important historical events, the Alcazar de Toro is one of the main buildings of the city.
After the división of León and Castile in the mid-12th century, Toro remained in the kingdom of León. In 1199 Alfonso 9th married Doña Berenguela and between 1188 and 1195 he started the construction of the castle and the walls. Sancho IV donated Toro its fortress to his wife, María de Molina, in 1283, and she rebuilt the old castle giving it the present structure. In the mid-19th century the castle was in ruins, having been used mostly to store gunpowder.
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.