Cerberus (Greek: Κέρβερος, Kérberos) in Greek and Roman mythology,'s a multi-headed dog which guards the gates of Hades, to prevent those who've crossed the river Styx from ever escaping. Cerberus featured in many works of ancient Greek and Roman literature and in works of both ancient and modern art and architecture. As with most creatures from classical mythology, the depiction and background surrounding Cerberus often differed across various work… (More on Cerberus)