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Origin and history

The Church of the Holy Trinity, located in Hedouville in Val-d'Oise, is a religious building whose oldest part, the central ship, dates back to the 1230s and 1240s. This ship consists of a short nave not vaulted and a square vaulted choir, typical of 13th century rural churches. Although lacking a remarkable architecture, it preserves original elements such as a double-rolled triumphal arch and partially abrased capitals. The seigneurial chapel, added to the north of the choir in the 16th century, is closed by a Renaissance-style wooden gate, added later.

The church underwent few major changes, with the exception of the complete restoration of the 1920s, financed by the commune for the outside and by the parish priest and bishop for the interior. It was listed as historical monuments on June 16, 1926. Originally dedicated to the Holy Trinity or to the Saint-Sauveur, she reported under the Old Regime of the diocese of Beauvais. After the Revolution, it was attached to the diocese of Versailles and then to Pontoise in 1966. Today, it depends on the parish of Nesles-la-Vallée and rarely receives offices.

The furniture, though modest, includes notable elements such as a 14th century statue of the Virgin with Child, a baptismal vats dated between the 14th and 16th centuries, and a bronze bell of 1888, recast from a bell of 1660 named Jeanne. The lateral chapel, transformed into a sacristy, preserves a carved wood fence in Renaissance style (1560-1610), while the baptismal fonts and an illegible funeral slab testify to its parish history.

The exterior of the church, sober, is marked by simple foothills and walls in irregular rubble. The western facade, flanked by redone foothills, presents a third-point portal with thin columns, typical of a village architecture according to Louis Régnier. The bedside, partly made of cut stone, preserves the traces of an old triplet replaced by a bay in full hanger, today blocked. The roofs, covered with slate, house a small wooden bell tower above the nave.

The church illustrates the evolution of a rural parish, from its medieval foundation to its integration into modern diocesan reorganizations. Its inscription in historic monuments highlights its heritage value, despite its lack of sumptuous decoration. The archaeological analyses, notably those of Louis Régnier and Bernard Duhamel, have made it possible to date his construction campaigns and to identify possible re-uses, such as the larmary of the lateral chapel, possibly from an earlier building.

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