Abbaye de Bonlieu, Medieval Cistercian abbey in Peyrat-la-Nonière, France.

The Abbaye de Bonlieu is a Cistercian monastery in Peyrat-la-Nonière, France, featuring a rectangular defensive tower built in 1421 and a square stair turret with a spiral staircase at its center. The complex preserves several medieval structures that reflect the architectural style of this religious community.

On 4 September 1119 Amelius de Chambon gave the Mazerolles estate to Géraud de Salles, whose companions came from Dalon Abbey in Périgord, to found a hermitage. At Géraud's death in 1121 it became an abbey in Dalon's filiation, with Pierre de Saint Julien as first abbot. In 1162 Bonlieu joined the Cistercian order with Dalon, under Pontigny. The church was consecrated in 1141 and again in 1232.

The name Bonus Locus, or Bonlieu, was given by Bishop Guy du Cluseau at the 1141 consecration because of the good life of the first monks. In the ruined chevet, two painted consecration crosses still flank the axial window, probably dating from the 1232 reconsecration. The abbey kept up to 17 granges, and the nearby Grange de La Porte survives as one example.

The monastery is privately owned and requires advance planning to visit, with specific access arrangements necessary to explore the historical structures. Contact ahead of time to arrange a viewing with the owners.

The monastery complex features a medieval bridge with two broken-arch spans supported by triangular buttresses, demonstrating advanced engineering of the period. This structure is a rare example of the practical building skill of medieval craftsmen.