Between 1030 and 1046, a charter mentions the donation by a lady Berthe and her children to the Saint-Père abbey of Chartres, of the estate and the church of Chapelle-Royale.
Part of the western facade of the Notre-Dame church and the eaves walls pierced with tiny Romanesque windows appear to date back to this foundation. Towards the end of the 15th century, between 1460 and 1500, four large windows with flamboyant tracery were opened in the choir; the glass windows, which dated from the 17th century, have disappeared with the exception of a medallion representing Christ on the cross with the Virgin and a holy woman at his feet.
The building is a simple rectangle measuring 28 m by 10 m, covered with a wooden vault with tie beams; the entrance closest to the altar is fluted and has devouring monsters at its ends. In the north wall opened a door with a lowered arch, decorated with sculptures (cherubs and flowers), which was walled up. A small niche, made in the pillar next to this door, once housed a statue of Saint Blaise.
On the roof of the nave rises the octagonal spire of the bell tower, made of wood covered with slate.
The Safeguarding of French Art contributed in 1992 for 10,000 F to the repair of the roof damaged by a storm.