Abbaye Notre-Dame-de-la-Joie, Hennebont, Cistercian abbey in Hennebont, France

Abbaye Notre-Dame-de-la-Joie is a monastic complex in Hennebont with two L-shaped buildings whose facades, roofs, and interior staircases are registered as protected monuments. The site also includes stables and a separate house that once served the clergy attached to the community.

Founded on 5 October 1275 by Blanche de Champagne, wife of Duke John I the Red, the abbey was occupied by nuns from Saint-Antoine-des-Champs in Paris, with Sibille de Beaugé as first abbess; it was affiliated to L'Aumône Abbey in 1279. A fire on 25 July 1510 destroyed the church, sacristy, chapter house, dormitory and much of the cloister; rebuilding followed in 1693 under Abbess Suzanne de Plœuc. The last abbess and nuns were expelled in October 1792, and the church was then used by quarrymen.

The first abbess, Sibille de Beaugé, died in 1320; she was a first cousin of Duchess Blanche and came with nuns from the Paris abbey of Saint-Antoine-des-Champs. In 1279 the house was affiliated to L'Aumône Abbey in the Chartres diocese, like other Breton Cistercian abbeys. The last abbess, Madeline Clotilde de La Bourdonnaye de Blossac, governed from 1776 until the nuns were expelled in October 1792.

The abbey buildings stand within the National Stud Farm, which moved to the upper plateau above the site in 1856. In 1920 horse stalls were fitted into the ground-floor salons of the abbot's dwelling, with grooms housed upstairs and in the Maison des Confesseurs. The Maison des Confesseurs, owned by the town of Hennebont, now serves as an artists' residence.

The Maison des Confesseurs, now called the Porterie, was rebuilt in 1699, as the date carved on a dormer pediment shows. It first housed the priests who celebrated the Divine Office for the nuns, and became an entrance after the Blavet was canalised. The town of Hennebont restored it and now runs artist residencies there.