Saint-Brieuc Cathedral, Gothic cathedral in Saint-Brieuc, France.

Saint-Brieuc Cathedral is a Gothic church on Place du Général de Gaulle, built from the 13th to the 18th century. Its west front has two towers: the 14th-century Tour Brieuc, 92 feet high, and the 15th-century Tour Marie, 108 feet high, with loopholes and machicolations. The interior nave has seven bays with ribbed vaults and a large window at the far end.

Construction of this cathedral began in 1220 and continued over centuries, reflecting the architectural style changes of its era. In 1906 it received protected historical monument status under French cultural heritage law.

The cathedral is one of the seven cathedral stages of the Tro Breiz, a Breton pilgrimage route. Its organ was built between 1847 and 1849 by Aristide Cavaillé-Coll, also known for the organ of Saint-Sulpice in Paris; lightning struck the Tour Marie on 11 July 1852 and damaged the newly installed instrument. The Chapelle de l'Annonciation holds a baroque altarpiece, and the Stations of the Cross were carved in 1958 by Georges Saupique.

The building is easily reached on foot from the city center and sits centrally at Place du Martray, making access straightforward. Visitors should note that opening hours vary depending on the season and religious services taking place.

The cathedral features rare defensive elements such as arrow slits in its towers, as it was designed to serve as a fortified structure. This unusual blend of sacred and military features makes it one of the few fortified churches in the region.