Le prieuré ou église Saint Félix

At the top of the village, the ruins of the medieval castle and the church of Saint-Félix bear witness to the intense life of the Middle Ages.

It was built on the site of a primitive church built in honor of Felix, evangelizer of the Rhône valley. At the time, it was located within the castle ramparts, below the keep, which has now disappeared. Archives show that the prior of Saint Félix belonged to the canons of Saint-Tiers de Saoû.
It has been listed as a historic monument since July 13, 1926.
The church has a tiled roof and is built of rubble stone and ashlar, the latter being used only for the quoins and window surrounds.

The façade features a simple doorway and an arched bay, a semicircular apse and a fine Romanesque tower.
This tower, adjoining the north-west façade, comprises four levels separated by powerful stone cords.
It features a small bay on the second floor and arched geminated bays on the two upper floors. The geminated bays on the second floor are separated by a simple trumeau, while those on the top floor are separated by a column. On the north face of the tower, the geminated bays on the second floor have been replaced by a large ogival bay.

Inside, the church has a single nave, extended by a barrel-vaulted apse.
The right-hand wall of the nave is pierced by several arched windows, while the left-hand wall is pierced by several ogival bays that allow the nave to communicate with the base of the tower.

It was recently renovated in 2024/2025 thanks to the Fondation du Patrimoine and the Loto du Patrimoine, in conjunction with the Mairie de Marsanne.