This church, originally dedicated to St Louis, was built from 1627-41 based on a plan inspired by the Gesù church in Rome. It took its present name after the destruction of the nearby Église Saint-Paul in the late 18C. The façade, with its Classical orders of superimposed columns, screens the dome. In the 17C, religious ceremonies took on a theatrical character here. The church’s fine furnishings were removed at the Revolution, though it is worth admiring the Mater Dolorosa, a marble sculpture by Germain Pilon.