Hercules defeats the Mares of Diomedes, detail of the Twelve Labors from a Roman mosaic from Llíria
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Hercules subdues the man-eating Mares of Diomedes. Detail of a Roman mosaic from Llíria, Spain. Museo Arqueológica Nacional, Madrid, 38315BIS. Photo by Luis Garcia via Wikimedia Commons. CC BY-SA 3.0.