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Origin and history

The chapel of the Cassine, located in Bonchamp-lès-Laval in the Pays de la Loire, is a vestige of the first Romanesque age, dated between the end of the 10th century and the beginning of the 11th century. This building, of a remarkable size for the period (30 meters long by 16 wide), is distinguished by its complex architecture: a nave with three vessels, a little salient transept, and a bedside with five apsidioles reaching the height of the nave. Its geographical isolation, 3 km south of the village and away from the houses, as well as the absence of ancient written sources, make it an enigmatic monument. Archaeological excavations revealed pre-construction Merovingian burials, suggesting an ancient occupation of the site.

The first written mention of the Cassine appeared in 1422 in the will of Jeanne Ouvrouin, chestnut of Poligné, who described her as "the chapel of the Holy Sepulcher" and left funds there for her reparation. A 1549 text evokes its partial attachment to the priory of Avènere (depending on the Ronceray d'Angers Abbey) and to the local lords, while in 1660 it belongs to the domain of Poligné. Its early abandonment, the lack of urban development around, and the scarcity of written archives underline the failure of this ambitious architectural project. Modern specialists regard it as a church rather than a chapel, due to its size and exceptional features for the time.

The building features rare architectural elements, such as a gate decorated with white limestone and russard sandstone cross-linked motifs, high-hanging windows, and foothills surrounding the entrances. The nave, partially collapsed, suggests a frame cover, while the apsidioles and the choir retain traces of their original height (more than 10 meters). Ranked a historic monument in 1926, the chapel is now a ruin located in a private property, accessible since the D21, ancient medieval way. His name, Cassine, could derive from the old French house (small house), although his exact function — aborted parish church, funeral chapel, or place of pilgrimage — remains uncertain.

Archaeological studies, conducted in 1861 by A.L. David and L. Garnier, then in 1988, confirmed the Merovingian occupation of the site and clarified its architecture. Comparisons with other Romanesque buildings, such as the Lion-d-Angers church, and carbon dating 14 place its construction between 975 and 1020. Despite its state of ruin, the Cassine bears witness to a major religious project, perhaps linked to a local seigneury or a monastic foundation, whose history remains to be clarified.

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