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Origin and history

The church Saint-Maclou de Conflans-Sainte-Honorine, located in the Yvelines in Île-de-France, is a religious building whose oldest parts date back to the 12th century. Its foundations, including the nave, the base of the bell tower and the first span of the choir, date from the second and third quarter of the 12th century, with late Romanesque elements such as carved capitals and archaic warhead arches. These parties already announce Gothic architecture by their stacks bounded with columns and the systematic use of broken arch. The church was enlarged in the 13th century by the addition of two crucifixes and side chapels, and then rebuilt after the Hundred Years' War, in the early 16th century, in a flamboyant Gothic style. A five-sided apse and chapels dedicated to the Virgin Mary and Saint Nicholas (later Saint Honorine) were added.

The history of the church is closely linked to that of the neighboring priory, founded in the 11th century by the Counts of Beaumont, seigneurs of Conflans. This priory, dedicated to Saint Honorine, housed the relics of the saint, transferred in 1086 or 1087 in the presence of Abbé Anselme du Bec, future Archbishop of Canterbury. These relics, the object of a strong popular devotion, were hidden during the Revolution before being returned to the parish in the early 19th century. The parish church of Saint-Maclou, distinct from the prioral church, was classified as historical monuments in 1993 after several restoration campaigns, notably in 1995, where the false neo-Gothic vaults of the nave were removed to find the original laminated ceilings.

The church architecture reflects its many phases of construction. The nave, initially un arched, is flanked by flamboyantly-enlarged lowsides, while the bell tower, rebuilt in the same way after a fire in 1927, dominates the building with its four-lantern stone arrow. The eastern parts, including the choir and side chapels, feature Gothic and flamboyant dogive vaults, as well as 19th-century historical stained glass windows. Among the remarkable elements are the historical Romanesque capitals of the base of the bell tower, the neo-Gothic woodwork of the chapels, and the reliquaries of the saints Honorine and Marguerite, preserved in the northern chapel.

The church has undergone several restorations over the centuries, especially in the 19th century under the impulse of Abbé Lefèvre, who introduced neo-Gothic elements such as the organ stand and the false vaults of the nave. These changes, criticized by the experts of the time, were partially corrected in modern restorations. Today, the Saint-Maclou church, classified as a historical monument, remains an active place of worship and an architectural testimony of the stylistic transitions between Romanesque and Gothic, while preserving traces of its medieval history and its central role in the religious life of Conflans-Sainte-Honorine.

The church furniture includes rooms classified or inscribed in historical monuments, such as the shawls of the Saints Honorine and Marguerite, paintings of the seventeenth and eighteenth centuries, and 19th century Sulpician statues. The stained glass windows, mostly dating from the 19th century, illustrate hagiographic scenes and local episodes, such as the translation of the relics of Saint Honorine. The building also houses funerary monuments, including the laying of Mathieu IV de Montmorency, lord of Conflans in the 13th century, and a medieval funeral slab. These elements, combined with architecture, make the Saint-Maclou Church a rich and diverse heritage, reflecting nearly a thousand years of religious and local history.

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