The church of Bleury, dedicated to Saint Martin, probably dates from the end of the Middle Ages. It was remodeled and enlarged in the 16th century by the addition of a large chapel on the north side. The nave ends with a semicircular apse. The chapel to the north is extended by a square bell tower which once opened onto the nave through an arch that is now blocked but still visible. The chapel opens onto the nave through two pointed arches made of recently rendered clotted stone. It communicated with the ground floor of the courtyard through an arch that is now closed. Another filled-in arch appears on the wall between the chapel and the lower room of the courtyard. The church is covered with a paneled roof. A single beam is sculpted, the penultimate one on the west side. It supported, with the beam resting on the facade wall, a recently demolished gallery. Some of the nave's semi-circular windows are late, and the pointed arch openings have Gothic tracery. The square bell tower has a saddleback roof. It is pierced with pointed arch openings. Access to the building is from the south, under a modern porch that houses a portal surmounted by a shield with three fleurs-de-lis. A stone cornice runs under the roof to the south, supported by unsculpted modillions. Two 18th-century altarpieces were included in the Supplementary Inventory of Historic Monuments on June 17, 1975. 16th-century wall paintings depict the Mass of Saint Gregory. They were discovered in 1881 and classified as Historic Monuments on November 17, 1908. Their preservation is currently threatened by infiltration due to the poor condition of the roof structure. The Sauvegarde de l’Art Français provided aid of 75,000 F in 1994, thus contributing to the repairs undertaken to restore the framework, which will allow the walls to be cleaned up.