Church of Saint-Martin

The Saint-Omer church is located in Ochtezeele, in the Hauts-de-France region. The church was built on the foundations of a former 12th century oratory, whose main facade can still be seen on the western side, and is the main witness to the original Romanesque style building. The enlargement of the building took place in the 15th-16th century. Built on a church-hall plan, very popular in the coastal region, the church includes an octagonal bell tower which is one of the highest in Flanders.

The church of Saint-Eloi, known as the cathedral of Les Sables, dates from the middle of the 15th century. In 1558, the French led by the marshal de Thermes invaded the town and burned the church. Only the tower remained. The reconstruction of the church began around 1560 under the direction of the master-builder Jean de Renneville. The old tower, separated from the new church by part of the ruins of the first church, remained isolated and was used as a belfry. The belfry is listed as a UNESCO World Heritage Site under the title Belfries of Belgium and France.

The church of Saint-Denis is recognisable by its enormous 13th-century bell tower, the oldest in the North of France. The church was favoured by the Collège de Saint-Omer which was run by English Jesuits. Many English and American Catholic families sent their children there to study, despite Queen Elizabeth I's prohibition. The interiors are particularly rich in examples of numerous artistic movements from the 15th to the 19th century. Its classical barrel-vaulted sanctuary, interiors and furnishings date from an 18th-century reconstruction.