The patrons of Grazzano Badoglio are Saints Victor and Corona, celebrated on 14 May, to whom the Chiesa dei Santi Vittore e Corona is dedicated; on that day the reliquary arm of Saint Victor is carried in procession.
The 16th-century wooden choir is next to the sacristy where the reliquary arm is kept; in the chapels, some of which still keep their original stuccoes, paintings of considerable interest can be admired.