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Heritage classified

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Origin and history

The Sainte-Marie-Madeleine chapel of Quinquenevent, located on a limestone island of the former Gulf of Machecoul, was founded in the 12th century by Augustine monks of the Saint Vincent Abbey of Nieul-sur-l'Autise. These religious, who came to dry up the marshes regularly flooded by the sea, undertook the first hard work (such as the Quinquenavent roadway) and the construction of locks. This project was part of a context of agricultural and saliculture development, where the conquest of new land was essential for local communities. The chapel, in Romanesque style, consists of a unique 13th century nave and a hemicircular apse choir dating from the 12th century, lit by murderers in two rows.

In the 16th century, conflicts over income and territory led the monks to abandon the marsh. The chapel, repaired in the 18th century, retains a major archaeological interest thanks to its vaulted crypt, accessible by low openings. The choir, lined with flat foothills, and the unique span nave illustrate the Romanesque religious architecture of the region. Classified as a historic monument in 1997, it is now a private property, bearing witness to the history of hydraulic installations and monastic life in the Pays de la Loire.

The location of the chapel, on the town of Machecoul (Loire-Atlantique), reflects its historical role in the drying of the marshes and the structure of the landscape. The Augustin monks, in addition to their spiritual mission, played a key role in spatial planning, combining hydraulic know-how and economic development. The building, although closed to the public, remains a marker of the Romanesque heritage and medieval dynamics of wetland development.

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