Santa María de La Vid is a monastery in Spain's Duero Valley was founded on a different site, a place called Montesacro, in about 1146 by Domingo Gómez, illegitimate son of Queen Urraca of León and Castile and her lover Count Gómez González de Candespina. Domingo had become interested in the Praemonstratensian order on a visit to France, and this was the first Praemonstratensian house in Spain.
The monastery was moved to its present site in 1152, having been given the estate of La Vid by Alfonso VII of León and Castile, who was the half-brother of Domingo Gómez. It was closed as a result of the ecclesiastical confiscations of Mendizábal in the 1830s. It was re-opened in the 1860s by the Augustinians who still inhabit it.
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.