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Heritage classified

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Origin and history

The Saint Sulpice church of Pierrefonds, located in the Oise, is a building of complex origins, mixing Romanesque and Gothic styles. Founded around 1060 by Lord Nivelon I, it initially housed a chapter of canons before being attached to the Abbey of Marmoutier (Tours) at the end of the 11th century. The crypt, the historic heart of the monument, preserves the tomb of Nivelon and a thermal spring at the origin of the name Pierrefonds ("stone that melts"). The three remaining Romanesque arcades, dated around 1100, connect the Gothic choir (XIIIth century) to the flamboyant naves (XVth–XVIth centuries), reflecting a progressive reconstruction.

The present configuration is the result of major transformations: the Romanesque nave, replaced at the end of the Middle Ages by a double nave to welcome pilgrims, contrasts with the 13th century choir, rebuilt in the same way after the destruction of the First World War (1926–1930). The bell tower, whose base is Gothic (XIIIe), ends with a Renaissance (1557) floor decorated with niches and a lantern. Ranked a Historical Monument in 1862, then in 1885 (clocher) and 1920 (rest of the building), the church illustrates the architectural and spiritual evolution of the area, between seigneuriality, monasticism and thermal worship.

The crypt, partially underground, is a rare vestige of the rural Romanesque churches of Hauts-de-France. Organised in three arched vessels in a cradle, it housed a pilgrimage linked to the spring and relics, now inaccessible due to unfinished restorations (since 1948). Romanesque capitals, similar to those of Saint-Léger de Soissons, and blind arcades underline his role in medieval devotion. Outside, the flamboyant portals (15th century), especially the one in the north decorated with statues of St. Peter and St. Paul (1400), reflect the sculptural richness of the period, despite revolutionary damnations.

The church, opened daily, remains an active place of worship within the parish of Notre-Dame-de-Neufontaine, while embodying a heritage marked by conflicts (wars, destructive humidity) and reconstructions. Its classified furniture, such as the bell of 1574 or the 17th century tabernacle, completes a collection of local history, sacred architecture and seigneurial memory.

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