Epona was a protector of horses, ponies, donkeys, and mules. She was particularly a goddess of fertility, as shown by her attributes of a patera, cornucopia, ears of grain and the presence of foals in some sculptures.
The worship of Epona was widespread in the Roman Empire between the 1st-3rd c. AD; this is unusual for a Celtic deity, most of whom were associated with specific localities.
Digital Maps of the Ancient World 