The parish church of La Baule was built between 1935 and 1937 in a slightly austere neo-Gothic style — pale stone, a tall square tower, and stained glass that reads as Art Deco more than medieval. It is not famous, but it is one of the few buildings in town that interrupts the relentless Belle Époque mood.
Open during daylight hours, free entry. The summer concert series (mostly classical, sometimes organ) is genuinely worth checking — programmes posted at the church door or on the town's website.