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Origin and history

Bonnevaux Chapel, located in Buno-Bonnevaux in the Essonne department, is a 13th-century Catholic religious building. It once constituted the parish church of Saint Sulpice de Bonnevaux, an independent village before the French Revolution. After Bonnevaux joined Buno in 1794, the church, already in ruins, was partially destroyed at the beginning of the 19th century, retaining only its choir and a span of the nave. The chapel became private property in 1816, purchased by Mademoiselle d'Averton, owner of the nearby castle of Chevrainville.

In 1816, despite the wish of Mademoiselle d'Averton to restore worship, the chapel was transformed into a hunting relay. Major work was undertaken in 1959, including the addition of a concrete floor dividing the space into two levels, a brick chimney, and structural modifications. These alterations altered its original appearance, although architectural elements such as side windows, oculus and lancets were preserved. The chapel was listed as historic monuments in 1950, recognizing its heritage value.

Architecturally, the chapel presents a rectangular plan, characteristic of medieval religious buildings. Its tiled roof rests on a wooden frame, while the interior, modified in the 20th century, incorporates modern elements like a metal staircase. The site, located on the edge of a clearing near the Essonne valley, occupies private land. Its history reflects the post-revolutionary upheavals and the changing uses of religious buildings in rural areas.

Before its partial destruction, the church of Saint Sulpice de Bonnevaux played a central role in the life of the local community, as a place of worship and assembly. The municipality of Bonnevaux, now extinct as an administrative entity, illustrates the demographic decline of some rural areas after the Revolution. The connection to Buno in 1794 and the sale of the building in 1816 marked the end of its initial religious use, replacing its spiritual role with a secular function, typical of the heritage conversions of the time.

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