Saint Magnus of Avignon (French: Saint Magne) (died 660) was a bishop and governor of Avignon, his native city. He was a Gallo-Roman senator. A widower, he was the father of Saint Agricola of Avignon. Magnus became a monk and then became bishop of Avignon. He appointed his son coadjutor. He is the patron saint of fish dealers and fishmongers. His feast day is August 19.

Stained glass window in the church of Saint-Agricol in Avignon, depicting Magnus of Avignon.

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