Abbaye de Moutier-d'Ahun, Benedictine abbey in Moutier-d'Ahun, France.

Abbaye de Moutier-d'Ahun is a former Benedictine monastery whose oldest surviving parts date from the 12th century, with the abbey church rebuilt from 1489 in Gothic style. A square tower with a pyramidal tiled roof and rows of round-arched openings rises above rough grey and tan masonry, and a steep gabled section joins a recessed pointed archway filled with carved stonework and closed by an iron gate.

Boson II of La Marche founded the monastery in 997, dedicated to Mary, Mother of God, and placed under the Benedictine rule; a document in the cartulary of Uzerche Abbey records the act. It held 22 churches, chapels and priories across three dioceses. The oldest surviving remains date from the 12th century; after damage in the Hundred Years' War the abbatial church was rebuilt from 1489. In 1591 troops of the Catholic League under Toirac fortified the monastery, and the fighting left the nave collapsed and the site abandoned for about twenty years.

The name Moutier-d'Ahun comes from monasterium, which became mostier in Occitan and later moutier in French; in 1790 it gave the commune its name. The choir stalls, carved 1678-1680, carry faces, floral motifs and fantastic animals, and the church also holds a bifacial Christ and a large lectern. During the Revolution, by local oral tradition, the panelling was coated in white plaster; a 1896 attempt to strip it failed.

The former nave is now a garden; linden trees mark where its pillars stood, and on the right as you enter stands a Gallo-Roman milestone of 243 AD giving 34 leagues from Ahun to Limoges. A carved Gallo-Roman funerary stele is set into the outer wall of the church porch. The village lies in the Creuse department, and the church is the parish church of Moutier-d'Ahun.

In the garden that replaced the collapsed nave, linden trees mark the supposed positions of the old pillars. On the right as you enter stands a Gallo-Roman milestone dating to 243, under Gordian III, giving the distance from Ahun to Limoges as 34 Gallic leagues.