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:
The Château d'Olhain is probably the most famous castle of the Artois region. It is located in the middle of a lake which reflects its picturesque towers and curtain walls. It was also a major stronghold for the Artois in medieval times and testimony to the power of the Olhain family, first mentioned from the 12th century.
The existence of the castle was known early in the 13th century, but the present construction is largely the work of Jean de Nielles, who married Marie d’Olhain at the end of the 15th century.
The marriage of Alix Nielles to Jean de Berghes, Grand Veneur de France (master of hounds) to the King, meant the castle passed to this family, who kept it for more than 450 years. Once confiscated by Charles Quint, it suffered during the wars that ravaged the Artois. Besieged in 1641 by the French, it was partly demolished by the Spaniards in 1654, and finally blown-up and taken by the Dutch in 1710. Restored in 1830, it was abandoned after 1870, and sold by the last Prince of Berghes in 1900. There is also evidence that one of the castles occupants was related to Charles de Batz-Castelmore d'Artagnan, the person Alexandre Dumas based his Three Musketeers charictor d'Artagnan on.
During the World War I and World War II, the castle was requisitioned first by French troops, then Canadian and British soldiers. The current owner has restored the castle to its former glory.