Castle of Laguna de Negrillos is one of the fortress that belonged to the Conde Luna, with a characteristic structural style which features for a square floor and use of masonry , except in the corners, whose arris are built in ashlar stone. The keep tower and the crenellated walls are preserved.
It was arisen in the 13th century, although what you can seen today is the reconstruction carried out in the 15th century by Don Diego Fernández de Quiñones and Doña María de Toledo.
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.