Mullo is a Celtic god worshipped in Gaul. His name may indicate an association with mules and horses, and he was known as a god of healing, particularly the healing of eye disorders.
He was sometimes depicted accompanied by a serpent with the head and horns of a ram, strengthening his connection with the healing arts.
Mullo was sometimes identified by the Romans with their god Mars by way of the interpretatio romana.
Mullo received votive and dedicatory offerings from his worshippers; otherwise little is known of the specifics of his cult. He had a healing temple at Craon, France.
The origin of Mullo’s name is uncertain; it has been suggested that, given the Latin mulus or “mule,” “Mullo” might be a Roman name for an otherwise-unnamed Gaulish god..
Mullo was worshipped primarily in what are now the French regions of Brittany and Normandy,
Allonnes, France; Athee, France; Craon, France; Nantes, France; Rennes, France