Saint-Benoît-sur-Loire is famed for its great Benedictine abbey, the Abbaye de Fleury, which was founded in the 7th century. The abbey's bright and beautifully proportioned basilica, built between 1067 and 1218, is one of the finest Romanesque churches in France.

 The most outstanding feature of the church is the porch tower, with its ornately carved capitals. Inside the 12th-century crypt are the relics of Saint Benedict, brought here from the Abbey of Monte Cassino (near Naples in Italy) in the late 7th century.

The monastic community of the Abbaye de Fleury was dissolved at the time of the French Revolution but was re-established in 1944 by a group of Benedictine monks. Today this working monastery has a community of 32 monks and nuns. 

Besides the spiritual aspect of the monastery, the Abbaye de Fleury has two artisanal workshops: the Atelier de Porcelaine, where monks handcraft porcelain plates, mugs, and bowls, and the Atelier de Confiserie, where specialty confections such as fruit candies, caramels, and honey bonbons are created. 

Although much of the abbey is reserved for use by the monastic community, the basilica is open to the public; visitors may spend time in prayer, take a guided tour, or attend a concert (classical music performances are occasionally held on Sunday afternoons).