Chapelle des marins à Saint-Valery-sur-Somme, Gothic Revival chapel in Saint-Valery-sur-Somme, France

The Chapelle des Marins, also called Chapelle Saint-Valery, is a neo-Gothic chapel on the heights of Cap Hornu, built of white stone and flint laid in a checkerboard pattern. Its steep gabled facade carries a slate spire with a cross and louvered belfry, a round rose window with radiating tracery above an arched doorway closed by a dark metal grille, and buttresses with columns along the walls.

Saint Blimont, a disciple of Valery of Leuconay, had a chapel built on the site of his master's hermitage to hold his remains; an 11th-century chanson de geste places a battle "at Cayeux, under the chapel". During the French Revolution it was turned into a saltpetre works, then returned to worship after the Concordat of 1801. In 1878 the town's notables funded its rebuilding, completed in 1880.

Sailors hang ex-votos on the walls or leave models of their own boats there in thanks for surviving a shipwreck. The stained glass tells episodes from the life of Saint Valery, and at the foot of the building stands the Fontaine de la Fidélité, reputed to cure eye ailments and keep couples faithful.

The chapel stands on the heights of Cap Hornu, above Saint-Valery-sur-Somme, reached by the path that passes its door; trees line the approach. The miraculous Fontaine de la Fidélité lies at the foot of the building. The site is cared for by the Association de Sauvegarde de la Chapelle Saint-Valery.

The metal seagull on the roof cross turns with the wind, above the belfry. The chapel also keeps votive ship models made and hung by sailors who survived shipwreck, and a spring called the Fidélité flows at its foot, credited with curing eye ailments and keeping couples faithful.