In Gallo-Roman religion, Epona was the goddess of horses and ponies. She was also a fertility and mother goddess, and was frequently depicted in art and sculptures either mounted on a horse, etc., or
Epona surrounded by four foals in the stables of a circus, engraved from a lost wall panting in the Circus of Maxentius
Epona, second or third century AD, from Contern, Luxembourg (Musée national d'art et d'histoire, Luxembourg City)
An altar to Epona dedicated by Claudius Maximus, governor of Upper Panniona (150-154 CE)
Epona and her horses, from Köngen, Germany, about 200 CE
In the material culture of classical antiquity, a patera or phiale is a shallow ceramic or metal libation bowl. It often has a bulbous indentation in the center underside to facilitate holding it, in
Epona
…on a horse, etc., (usually in sidesaddle position) or sitting on a throne with foals, or standing beside a foal. She is typically depicted holding a patera, cornucopia, fruit, bread, (wheat, grain); or accompanied by a foal or foals. She may have had a death goddess's aspect, and it is speculated that She…
Patera from Georgia, likely depicting Fortuna (2nd century AD, Georgian National Museum)
Octopus and dolphin motifs on a ceramic phiale (510–500 BC, from Eretria, Euboea)
Cylix of Apollo, who pours a libation (Attic white-ground kylix, c. 460 BC)
Silver phiale with Amazonomachy (430-420 BC, Vassil Bojkov collection, Sofia, Bulgaria)