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Origin and history

The Saint-Martin church of L'Isle-Adam, located in Val-d'Oise, is a Renaissance parish church built between 1487 and 1567. It replaces an old church in Nogent, which has become too small for the local population. The project was initiated by Louis de Villiers de L'Isle-Adam, bishop of Beauvais, with the financial support of the inhabitants. The building is marked by two distinct construction campaigns, led by at least two architects: Pierre Le Mercier (late 15th century) and Jean Bullant (from 1537), the latter being also the architect of the château d'Écouen for the connétable Anne de Montmorency.

The church was first consecrated in 1499, while it was still unfinished. The work continued until 1567, the date of his definitive consecration by Odet de Coligny, in the presence of the connétable Anne de Montmorency. The monument suffered several vicissitudes: a fire in 1661, which partially damaged the bell tower, and revolutionary destruction, which resulted in the loss of stained glass windows and the mutilation of sculptures. In the 19th century, Father Jean-Baptiste Grimot undertook a major restoration, including the reconstruction of the upper floors of the bell tower (1869) and the addition of a chapel of the Virgin (1875-1878), while gathering rich and varied liturgical furniture.

The architecture of the church combines Gothic elements, visible in the plan and the veins of the vaults, with Renaissance influences, especially in the bays in the middle of the hangar and carved decorations. The western gate, although restored in the 19th century, preserves traces of its original composition, mixing Gothic archatures and Renaissance motifs. The bell tower, rebuilt after the fire of 1661, peaks at about 42 meters and dominates the city. Inside, the nave, the transept and the choir have a remarkable stylistic homogeneity, with vaults with liernes and thirdons, while the chapels added later (burial chapel of the Bourbon-Conti in 1776, chapel of the Virgin in the nineteenth century) integrate harmoniously with the whole.

The church furniture, largely assembled by Abbé Grimot, has thirteen classified or registered objects, including 15th century stalls from Bordeaux, a composite Renaissance pulpit, and works of art such as a painting by Pieter Thys (17th century) or a funeral monument of Prince Louis-François de Bourbon-Conti. The stained glass windows, made between 1854 and 1878 by Lucien Laurent-Gsell, illustrate religious scenes and legends of saints, replacing the armored stained glass windows destroyed during the Revolution. The current organ, installed in 2024 by Rieger Orgelbau, succeeds a silent instrument since 1996, marking a new stage in the cultural and liturgical life of the building.

Ranked a historic monument in 1941, the Church of Saint Martin embodies almost six centuries of local history, combining architectural, artistic and religious heritage. Its central role in the community of L.

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