The Église Sainte-Catherine is the unmissable building on the eastern side of the bastide — a vast neo-Byzantine church built between 1890 and 1937, all banded brick and a domed central tower that rises well above every other roof in the town. It replaced a smaller, much older church that had been judged structurally unsafe at the end of the 19th century.
The interior is one large open space under the dome, with brickwork left exposed and a series of late 19th-century stained glass windows in deep blues and reds. There is none of the layered medieval clutter you find in older French churches; this is essentially one big architectural gesture, intelligently done. Daily mass is sparsely attended; the church is otherwise quiet and is normally open during the day.