This church from the XIIIth century was rebuilt in the XVth century because it was damaged by a fire. Its name was given after a Suiss abbot from the Vth century (there is a statue of him on the outside), and an ermit of the VIth century, Séverin the Solitary. Don't miss the neo-gothic columns, and the old and modern (1970, by Jean Bazaine) stained-glass windows.