Formerly a chapel, its existence recorded in 1500, this Romanesque building became a parish church in 1826. It is dedicated to Saint Claudius of Besançon. "In former times, the people of Le Casset used to go on a pilgrimage to Saint-Claude in the Jura." On the saint's feast day (6 June), a mass is celebrated. "Two days beforehand, the women of the village clean and decorate the church." Then, the people take an aperitif in the café opposite the church. Visits to the church are organised by the Tourist Office all summer.