Timeline

Heritage classified

Key figures

Origin and history

The Abbey of Notre-Dame d'Argenteuil, originally a monastery of Benedictines, is attested from the seventh century. Founded by Lord Ermenric and his wife Nummane, it welcomes the daughters of the Merovingian princely families. In the 9th century, Theodrade, daughter of Charlemagne, became its prioress and received the relic of the tunic of Christ, according to a tradition attested later. Ravaged by the Vikings, it was restored at the end of the tenth century by Adelaide d'Aquitaine, wife of Hugues Capet.

In the 12th century, Heloïse, known for his relationship with Abélard, studied there before becoming a prioress in 1129. A conflict with Abbé Suger led to the expulsion of the nuns in 1129, transforming the abbey into a male priory dependent on Saint-Denis. The monks rediscovered the tunic in 1156, attracting pilgrimages until the 14th century. The Hundred Years' War, the plague and the Great Companies ruin the monastery, which began in the 16th century.

In the 17th century, the tunic was once again venerated by the congregation of Saint-Maur, but the decline accelerated. The priory, sold as a national property in 1790, was demolished as a stone quarry. The remains, rediscovered in 1989, are classified as historical monuments in 1996. The site, open to the public since 2014, preserves traces of the abbey, a merovingian necropolis and its wine past.

The abbey was a place of power and spirituality, linked to figures such as Charlemagne, Héloïse and Suger. His tunic, an object of devotion, attracted kings and pilgrims until his architectural disappearance. Modern excavations have partially reconstructed its history, revealing its central role in Argenteuil's religious and social history.

The preserved elements, such as the Saint John chapel and a dimière cellar, testify to its medieval importance. The Virgin with the Child, called Our Lady of Humility, and architectural fragments preserved at the Cluny Museum, recall her artistic heritage. The ostensions of the tunic, revived in the 19th century, perpetuate its memory until today.

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