Abbaye Saint-Marcel-lès-Chalon, Romanesque abbey in Saint-Marcel, France

Abbaye Saint-Marcel-lès-Chalon is a former Benedictine abbey in Saint-Marcel, near Chalon-sur-Saône. Its parish church, rebuilt in the 12th and 13th centuries on remnants of King Guntram's 6th-century basilica, measures 56 m long and 18 m wide at the transept. The nave has five bays with square piers and pointed barrel-vaulted arcades, flanked by rib-vaulted side aisles; a square bell tower rises above the western porch, and the flat chevet is flanked by two apsidioles.

The martyr Marcellus died here in 177, and an oratory was built over the site of his torture. In 577–579 the Burgundian king Gontran founded a monastery with a basilica to honour him and was buried there in 592. Monks from Agaune in Valais introduced the laus perennis, uninterrupted praise sung by three alternating choirs. Ravaged by the Saracens after 731, the house passed to the bishops of Chalon, became a chapter, and was given to Cluny before 987, becoming a Cluniac priory until the Revolution.

The upper chapel of Saint-Michel, above the west porch, is painted with 13th- and 14th-century murals: the martyrdoms of Saint Catherine, Saint Marcel and Saint Valerian, and a Crucifixion with a donor kneeling at the foot of the cross. In the church, a stone plaque in the right aisle, probably set up after the Revolution, recalls the death of Peter Abelard at Saint-Marcel.

The church is entered through the two-leaf west door under the bell tower; the nave runs to a flat chevet, with the five mayors' benches along the central aisle. The north side is lined with regular buttresses, while the older south wall, where the cloister once stood, has none. The priory gate with its stone arcade stands at No. 8 on the church square, and the prior's house at No. 1 Rue du Prieuré.

In the right aisle stands the chapel of Saint Marcellus, holding his statue and a replica of the well in which he died; two portable reliquaries of Marcellus and Agricola, bishop of Chalon, hang on its walls. A stone plaque in the same aisle, probably set up after the Revolution, recalls that Peter Abelard died at Saint-Marcel in 1142.