Église Saint-Mesmin de La Chapelle-Saint-Mesmin, Medieval church in La Chapelle-Saint-Mesmin, France.

Église Saint-Mesmin is a pre-Romanesque Catholic church built in the 11th and 12th centuries. Its light grey stone tower, topped by a steep dark slate spire with small corner pinnacles, has two tall louvered lancet openings per face; a lower body of rougher grey masonry with a narrow arched window and an arched doorway adjoins it.

Saint Mesmin was buried in the cave beneath Villa Berarii in 520, and his tomb became a pilgrimage site. Around 550 the viscount of Orléans, Agylus, had a first funerary basilica built above it. The relics were moved to Saint-Aignan in Orléans in 675; the present church was built in the 11th and 12th centuries and ruined during the Hundred Years' War, then repaired in the second half of the 15th century partly with funds from Duke Charles of Orléans.

The church is named after Saint Mesmin l'Ancien (Maximin de Micy), buried in the cave beneath the site in 520; his tomb drew pilgrims, and the town takes its name from him. In 675 his relics were moved to the Saint-Aignan collegiate church in Orléans, though part of them later returned to the church. The parish registers kept by the priests begin in 1666.

The site is open during regular religious services and special events such as heritage days throughout the year. It helps to check ahead when services and ceremonies are held to plan your visit properly.

The church stands on a cliff above the cave of the Béraire dragon, the cave that gave the commune its first name, Villa Berarii. Saint Mesmin, who died in 520, was buried in that cave, and his tomb drew pilgrims who could be interred ad sanctus in the cemetery around the church.