In Greek mythology, Cerberus, often referred to as the hound of Hades, is a multi-headed dog that guards the gates of the underworld to prevent the dead from leaving. He was the offspring of the monst
Heracles, wearing his characteristic lion-skin, club in right hand, leash in left, presenting a three-headed Cerberus, snakes coiling from his snouts, necks and front paws, to a frightened Eurystheus hiding in a giant pot. Caeretan hydria (c. 530 BC) from Caere (Louvre E701)
Cerberus and Hades/Serapis. Heraklion Archaeological Museum, Crete, Greece
Heracles, chain in left hand, his club laid aside, calms a two-headed Cerberus, which has a snake protruding from each of his heads, a mane down his necks and back, and a snake tail. Cerberus is emerging from a portico, which represents the palace of Hades in the underworld. Between them, a tree represents the sacred grove of Hades' wife Persephone. On the far left, Athena stands, left arm extended. Amphora (c. 525–510 BC) from Vulci (Louvre F204).
Heracles, accompanied by Hermes, leading a two-headed Cerberus out of the underworld. Plate (c. 520–510 BC) attributed to Paseas [de] (also known as the Cerberus Painter) (Boston MFA 01.8025).
In Greek mythology, Echidna was a monster, half-woman and half-snake, who lived alone in a cave. She was the mate of the fearsome monster Typhon and was the mother of many of the most famous monsters
Cerberus
…hound of Hades, is a multi-headed dog that guards the gates of the underworld to prevent the dead from leaving. He was the offspring of the monsters Echidna and Typhon, and was usually described as having three heads, a serpent for a tail, and snakes protruding from his body. Cerberus is primarily known for…
Echidna. Sculpture by Pirro Ligorio 1555, Parco dei Mostri (Monster Park), Lazio, Italy
Cerberus, with the gluttons in Dante's Third circle of hell. William Blake.