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The Saint-Martin church, located in Châtaincourt, was not always the only place of worship in the commune. A small chapel did indeed exist between Châtaincourt and the hamlet of Boutaincourt at a very ancient date, since Louis VII the Young, King of the Franks from 1137 to 1180, came there on pilgrimage in 1155. The Saint-Jacques chapel, such was its name, and the place of the same name no longer exist today, they were destroyed during the Wars of Religion.

The current church was almost entirely rebuilt in 1542 on Gothic foundations. The Gothic church was reportedly destroyed in 1424 by the English. According to legend, Saint Lubin, Bishop of Chartres, came to rest in this place, which housed a recluse inhabited by a monk. A chapel was built there towards the end of the 6th century.

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Located on the banks of the Blaise River, southwest of Dreux in the prestigious Crécy-Couvé district, the Marquise de Pompadour's residence from 1746 to 1757, the seigneury of Saulnières came under the Marquise's ownership in 1754. Some remarkable elements of the church's furnishings are undoubtedly due to the generosity of this patron of the arts. The Saint-Pierre church, built on the heights of the commune of Saulnières, is believed to have originally been the church of a Benedictine convent, which ceded it to its inhabitants in 1571 after the sack of their place of worship in 1562, during the First Battle of Dreux. While the cartularies of Saint-Père, Beaulieu, and Belhomer mention the town from the first half of the 12th century, we have no documents on the church before its transfer to the commune. The building (34 m by 11.5 m), oriented, with a single nave of four bays extended by a choir bay, ends with a three-sided chevet extended along the axis by a sacristy. The walls are made of cobblestone and grison rubble, while the twelve buttresses are sandstone. The steeply pitched roof is covered with tiles, and, practically in its center, stands a bell tower with a hexagonal base crowned by a spire of the same shape. The western door is framed by two buttresses: it is surmounted by a rose window that probably dates from the 19th-century construction campaign. In the south wall, at the level of the first bay, a blocked, semicircular-arched entrance door suggests a Romanesque construction. From the second bay, light streams in generously through eight openings: semicircular arches for those in the nave and Gothic-style for the four choir bays; a fifth, axial, was blocked when the altarpiece was installed. The 16th-century stained-glass windows were destroyed during a bombing raid during the Second World War; only a few elements, listed as Historic Monuments, remain in the sacristy. The vault, covered with shingles, must have been painted, as evidenced by the hallmark decorated with black and white diamonds and chevrons, likely from the 16th century. The great simplicity of the architecture is offset by the relative richness of the furnishings. The late 15th-century stone statues representing Saint Barbara, a religious figure without attributes, and two angels from the same period constitute a fine example of Gothic sculpture, albeit lacking the two angels purchased in the early 20th century for the Louvre, where they are now on display. The choir's layout could date back to the time of Madame de Pompadour: the doors, open on either side of the central section, are surmounted by two painted and gilded wooden statues, Saint Peter and Saint Sebastian. The central section is crowned by God the Father, and the canvas depicts Saint Peter freed from his chains by an angel. A fragmentary funerary liter is still visible inside and outside. In 2003, the Sauvegarde de l'Art Français (French National Art Foundation) granted €10,000 in aid to help repair the structure and roof of the building, whose condition had been aggravated by the 1999 storm.

Mentioned in 1159 as a possession of the chapter of Chartres, the oldest parts of the church of Saint-Léger, the nave and western façade, must date back to the 11th century. The nave, 15 m long and 7 m wide, is built from small rubble stones embedded in mortar. Only the corner quoins of the façade and the semicircular arch of the entrance door are made of dressed stone. In 1514, a larger choir (10 m X 10 m) finished by a flat wall, was added to the east. Some of its pointed arched bays have retained their beautiful tracery. The entire choir and nave are covered by a beautiful framework in the shape of an inverted hull. A significant decoration, created in the 18th century, woodwork, stalls, work bench, glory arch, lectern, and communion railing have been fortunately preserved. Traces of medieval wall paintings and a coat of arms were spotted on the walls, as well as ancient graffiti on the exterior. A 12th-century stone baptismal font and a 15th-century stone statue of Saint Léger are listed as Historic Monuments. A slate bell tower, topped with a slate spire, rises above the slightly recessed gable of the western façade. The Sauvegarde de l'Art Français (French Art Protection Agency) granted aid of 100,000 francs in 1992 and then 40,000 francs in 1993 for essential work on the framework and roof.

Built in the 15th century on the foundations of a chapel whose origins can be traced back to a papal bull from Pope Alexander in 1142, Saint Apollonia was worshipped there.

The Notre-Dame Priory, founded around 1128 by Rahier de Muzy, was dependent on Coulombs Abbey and housed a community of Benedictines. This community was apparently never very large, as Eudes Rigaud's repeated visits in the 13th century only recorded four monks. In 1255, the monks no longer lived together at the priory due to lack of space. By 1269, the buildings were in too poor condition to accommodate the archbishop. Adjoining the convent buildings, the choir of the parish church of Saint John the Baptist was used by the monks. This 12th-century church, built "in a single heap," underwent several embellishments in the 18th century, but on July 21, 1794, it was probably converted into a saltpeter works, along with the entire priory. The church reopened for worship on March 22, 1795. A campaign of renovations restored the buttresses of the west facade with bricks at the end of the 19th century. The bell tower, damaged in 1944 during the fighting on the Avre, was restored in 1959. The monument was closed for another period from 1939 to 1950. The bells were electrified in 1985. Heating was installed in 1990. A restoration project for the entire building was adopted by the municipality in 2003. The roofing work—repairing the roof box—and the complete restoration of the north facade—raising the apron of the openings by approximately 40 centimeters, repairing all the buttresses and old lime plaster—were completed in 2006. The Church of St. John the Baptist has been listed on the supplementary list of historic monuments since December 2005. A competition to select a master glassmaker was held in April 2009. The winning candidate, Coline Fabre, was entrusted with the task of creating The stained-glass windows throughout the building. Four bays were installed in the spring of 2010 and eight in the summer of 2014, so that all bays on the north, east, and south facades were fitted with stained-glass windows. Rehabilitation work on the east and west facades and the installation of the stained-glass windows on the west facade began on November 20, 2018, and was completed at the end of June 2019. The stained-glass windows were inaugurated on September 13, 2019. Since February 2021, the bells have once again rung daily at 12:00 p.m. and 7:00 p.m.

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