Neptune

The Master of the Seas and the god of the "running waters," he is the deity who governs the unpredictable power of the horse and the ocean alike. For the Romans, who were a land-based people by nature, Neptune was a god to be appeased with awe and fear—the one who could sink the grain fleets or shake the very foundations of the land. He represents the fluid, shifting borders of the world, the deity who reminds us that even the greatest empire is ultimately at the mercy of the tides.