The church is dedicated to Saints John the Baptist and John the Evangelist[….
In 1733, the collapse of the bell tower led to the complete reconstruction of the building. The original building (the fortified Romanesque church erected by the Templars) had previously housed parish worship outside the walls in 1314. In 1746, Jean-Baptiste Franque, an architect from Avignon, completed the work on a project inspired by Montpellier's Jean Giral.
The building has three bays and a semicircular apse flanked by two rectangular apsidioles. A dome covers the transept crossing, the arms of which have groin vaults; the side aisles are covered with domes. The polychrome marble decoration was created between 1746 and 1754. Its finesse can be particularly appreciated in the north chapel dedicated to the Virgin Mary. The exceptional organ, the work of organ builder Jean François l'Epine, was built in 1758, and was notably restored by Aristide Cavaillé-Coll in 1853. It is in every way similar to the great organs of the Saint-Roch church in Paris.