During the 13th century Dardagny Castle, along with Bruel, La Corbière and Malval, formed a ring of castles, which secured the western boundary of the lands of the Bishop of Geneva. In 1298 there were two castles, which were separated by a small road. Each one belonged to one of the two noble families in Dardagny. In the 14th century, the south building was over two stories high and had a tower.
In 1646, the Favre family inherited both feudal domains in the village. Daniel Favre joined the two castles in 1655 through a gallery. He also built three towers and expanded the entire building. In 1721 Dardagny Castle went to Jean Vasserot who had the courtyard roofed over and converted into a feast hall which was decorated with Italian paintings. In 1740 staircase was built in the small central tower and the received its present appearance. It was purchased in 1904 by the municipality. They restored it in 1926 and 1932, after initially considering demolishing the building. Since then, the building has housed local government and a school.
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.