Église Sainte-Marie de Mont-Saint-Aignan, Catholic church in Mont-Saint-Aignan, France

Église Sainte-Marie de Mont-Saint-Aignan is not a Catholic church but the centre of a small independent, self-proclaimed "autocephalous" Christian community. The building has a tall triangular gable with a dark arched doorway and a statue in a niche above it; to the right, a long low white wall holds eight narrow arched windows. Inside is a chapel dedicated to Saint Rita.

A former priest named Maurice Cantor founded this independent church during the 1960s following disputes with Vatican direction. The establishment reflects a period when alternative religious communities began to form.

The community honours Saint Rita, to whom a chapel inside the church is dedicated, and practises exorcism, charismatic healing and the blessing of cars. Its liturgy follows the Roman Missal of Pius V but is celebrated in French, not Latin, and priests may marry.

The church stands on rue de la Vatine in Mont-Saint-Aignan, a northern suburb of Rouen. The entrance is through the dark wooden doors set in the tall triangular gable, with the eight narrow arched windows of the low white wall running to the right. The wide tan gravel forecourt in front gives level access to the doorway.

The community was legally registered in 1974 as the Association cultuelle de l'église vieille-catholique libérale, a 1901-law association. Its founder Maurice Cantor (1921-2016) was consecrated bishop several times, notably by Mario Cornejo, a former auxiliary bishop of Lima who left the Roman Church after marrying.