The church was begun in Romanesque period and has been continuously modified, making it a virtual catalog of French religious architectural styles, from the Romanesque to the Gothic, neoclassical and Gothic revival. Some of the elements of the original, such as the capitals of the columns in the arcades of the nave, were in poor condition and have been moved to the Cluny Museum of the Middle Ages. They have been replaced by very colorful copies, which along with the restored murals, try to recapture the spirit of the original church.During the 19th century restoration of the church, the neoclassical artist Hippolyte Flandrin was selected to design the overall decor. He directed a team of artists, who painted the colourful murals and elaborate decorative works that harmonise with the large paintings in the chapels along the nave and choir