The tall, narrow front of this important church (probably the most interesting after Saint-Sernin) is in between two buildings on the Rue du Taur. Look up to see the beautiful three-storey wall of bells (an architectural feature unique to this region), its two towers connected by a balcony and its crenulated pediment. The church is built on the spot where Saint Saturnin was buried and his martyrdom is depicted in a large nineteenth-century mural above the altar. More interesting, however, are the remains of a fourteenth-century fresco showing Jacob's genealogy.