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:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.