Månstorp was an old manor, Mogenstrup. Its first known owner belonged to the Danish family Hack. Later it was owned by the family Bille, notably Eske Bille who furnished Månstorp with all the luxury of the time. The main building was surrounded by a circular wall and moat. As part of the Scanian compensation estates for the island of Bornholm it passed from the Danish to the Swedish Crown. The castle was given to the Governor General of Scania, Lord High Admiral Gustav Otto Stenbock but later served as the colonel's residence.
During the war from 1675-1679 the castle was occupied by the Swedes and destroyed in 1678. The castle was never reconstructed following its destruction, tumbling down even more to become the ruin it is today.
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.