The Château de Courson was built in 1676. Originally the home of the Lamoignon family, the château has been in the same family since the 18th century. Its historic park was laid out in formal style by a pupil of André Le Nôtre in the 18th century. During the 19th century the gardens were twice remodelled, first around 1820 for the Duc de Padoue by the landscaper Berthault, then again around 1860 by the Bülhers, who laid out many French parks and gardens.
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.