Château de Sigy is a modernised castle which dates originally from the 14th century. It was much altered in the 15th, 17th and 18th centuries. Of note are the walls and roofs of the castle and its outbuildings, including two towers, the gardens surrounded by moats and two bridges across the moats. Inside, the central staircase with wooden balusters is beneath a dome. In the north wing, the grand bedroom and the Trudaine bedroom contain magnificent chimneys.
Privately owned, the castle has been listed since 1984 as a monument historique by the French Ministry of Culture.
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.