Saint Nicholas Church is a small Gothic church where Jean Calvin led services and preached in 1538. The Church no longer functions as a parish church, today it is used by a Charismatic group called 'Renouveau Saint Nicholas'.
The church was built between 1387 and 1454 on the site of an earlier church dedicated to Mary Magdalene. This earlier church, which dated from 1182, was founded by the Knight Walther Spender and had been built on the site of a small Roman fort. The tower with its tapering spire was erected in 1585 . The interior was remodeled during the 17th Century. The façade and the sacristy, which date from 1905, are by Émile Salomon, the architect of the Temple Neuf.
The interior contains remains of 15th Century frescoes. The 1707 organ of the brothers Andreas and Gottfried Silbermann was dismantled in 1967.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.