Église Saint-Efflam de Plestin-les-Grèves, Gothic Catholic church in Plestin-les-Grèves, France.

The Église Saint-Efflam is a Gothic stone church built on the site of a 15th-century chapel, whose inscription survives on the porch. Its south porch, carved in kersantite by sculptor Roland Doré, shows the twelve apostles with the signs of their martyrdom or mission, and Saint Yves in an oversized niche on the gable. The interior has five naves, making the building wider than it is long, and the bell tower carries 13th-century features, including mason's marks on several stones.

Construction began in the 15th century on the site of an earlier chapel, with the building undergoing multiple modifications and restorations over five centuries until World War II.

The church is dedicated to Saint Efflam, a saint widely venerated in this part of the Trégor, and it keeps his "tomb", a work of the 15th or 16th century that replaced an earlier tomb built for the translation of his relics in 994. The porch carries the twelve apostles with the signs of their martyrdom or mission, and Saint Yves in a niche too large for him, carved in kersantite by Roland Doré.

The south porch, whose inscription records the 15th-century chapel, is the richest carved element: the twelve apostles line both sides with the signs of their martyrdom or mission, and Saint Yves stands in the gable niche. Look for the masons' marks on the stones of the 13th-century bell tower. The interior is wider than it is long, with five naves, so allow time to move between them.

The building features an unusual layout with five naves instead of the traditional single nave, creating a wider-than-long interior that reflects centuries of architectural adaptations and expansions.