Montquintin Castle was probably originally designed to defend the southern border of the counts of Chiny. It was built in the 11th century by order of Louis II, Count of Chiny (born 1025). Over the centuries the castle has undergone many changes. The central part was rebuilt the 18th centuryt by the Bishop of Hontheim, last owner. In 1869 a fire destroyed the castle. The basement includes a vaulted cellar, which is very well preserved.
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.