Église Saint-Prix de Saint-Prix, Romanesque church in Saint-Prix, France

Église Saint-Prix is a stone church on a rise above a paved square in Saint-Prix. Its square tower, capped by a steep four-sided grey roof, rises over the transept crossing, and a rounded apse with a conical roof projects at the right. Inside, round arches and ribbed vaults rest on thick cylindrical pillars; a painted figure in blue and white is visible on one left pillar and a pale stone statue of a draped figure stands on a right pillar.

A first Romanesque church, perhaps represented by the corbels at the east and west of the bell tower base, was given around 1085 to the Abbey of Saint-Martin de Pontoise, which founded a priory here; the parish patron was then Saint Germain. From the late 12th century to about 1220 the church was rebuilt in early Gothic style, of which the nave capitals and the bell tower over the crossing survive. After the Hundred Years' War it was rebuilt again, vaulted in Flamboyant Gothic and given Renaissance arcades and a new apse. It was inscribed as a monument historique on 16 June 1926.

The village was long called Tour or Tor, and only took the name Saint-Prix after the pilgrimage to Saint Prix grew in the 15th century and eclipsed the original patron, Saint Germain. The church keeps relics of Saint Prix, and the nearby Fontaine Saint-Pry still plays a role in the local pilgrimage. Sunday Mass is now held only once a month.

The church stands at the top of the old village, its west façade on rue de la Croix Saint-Jacques with only a narrow parvis; a lane links it to rue Auguste-Rey. The narrow paths and nearby houses prevent seeing the façade and south side from a distance, but no buildings adjoin the church, so it can be walked around. The north side faces a parking area, with the cemetery higher on the hill.

The church keeps relics of Saint Prix, a bishop of Clermont, from its earliest period; his pilgrimage grew in the 15th century and displaced Saint Germain as patron, and the village itself took the name Saint-Prix. The church is now part of a parish grouping with Eaubonne, Montlignon and Margency, with only one anticipated Sunday Mass a month.