The church of Saint-Pierre d'Andenelle with its tower dates from the 12th century. Built of reddish sandstone, this remarkable monument of Mosan architecture is one of the oldest in the region. It underwent alterations in the 17th century (the inside pillars were changed), in 1853 (the entrance portal, which used to be found in the north, was moved to the west), in 1860 (building of the transept), in 1875 (the portal was moved to the north as a result of the building of the Andenne-Haillot road) and in 1923 (building of the side aisles). It is a mistake to believe that it was built in a hollow. In times past, it was level with the road and the square. People entered on a level, through a big door at the foot of the tower, next to the stream. But when the Haillot bottom road was built, the portion of the road was raised and people had to go down a few steps to enter the church.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.