Cerberus was the monstrous three-headed dog that guarded the entrance to the underworld, preventing the dead from leaving and the living from entering. The dog was the offspring of the monsters Typhon and Echidna, making it the brother of the Hydra, the Chimera, the Nemean Lion, and the Sphinx. Cerberus appears in many myths, most famously in the twelfth Labor of Heracles, in the descent of Orpheus to rescue Eurydice, and in the journey of Aeneas to the underworld. The name “Cerberus” is a synonym for the watchdog of the afterlife.
Cerberus is the watchdog of the underworld, the monstrous three-headed hound that prevents the dead from leaving. The standard source for the figure is the Iliad (Book VIII, lines 367–369, where Hektor threatens to feed his enemy raw to the dogs of Hades; Book XI, the Odyssey’s descent to the underworld), and Apollodorus’ Bibliotheca (2.5.12, the twelfth Labor). Hesiod’s Theogony (line 311 ff.) makes Cerberus a child of Typhon and Echidna. The standard treatment in the modern visual arts is the Laocoön group in the Vatican Museums, which shows the death of a Trojan priest and his sons by serpents but is often misread as depicting the killing of Cerberus.
The Origins of Cerberus
Cerberus was the offspring of two of the most fearsome monsters in Greek myth: Typhon, the last son of Gaia and Tartarus, who challenged Zeus for the rule of the cosmos; and Echidna, half-woman and half-snake, the “mother of all monsters.” From this union came the Hydra, the Chimera, the Nemean Lion, the Sphinx, and Cerberus.
The birth of Typhon and Echidna’s monstrous brood is told in Hesiod’s Theogony. According to Hesiod, Echidna was “fair-cheeked and lovely” but “a great scourge to mortals,” and she lived in a cave in the earth, where she bore her monstrous children. The offspring were scattered throughout the world, each in its proper place: Cerberus at the gates of the underworld, the Hydra in the swamp of Lerna, the Chimera in Lycia, the Sphinx in Thebes, and the Nemean Lion in the Nemean region of the Peloponnese.
The Description of Cerberus
In early Greek art, Cerberus was depicted with a single head and a serpent for a tail. In later art, beginning in the 5th century BCE, he was given three heads, and sometimes even more. The number of heads is not consistent in the ancient sources. Hesiod describes him with fifty heads, but most later sources say three.
In addition to his multiple heads, Cerberus had a serpent for a tail, snakes rising from his back, and a lion’s claws. He was the watchdog of the underworld, fierce and loyal, and he allowed the dead to enter but never to leave. He was said to be so terrifying that the very earth shook beneath his paws.
The Romans called him Cerberus, and they identified him with a dog that was the offspring of a mortal bitch and a monstrous father. In some Roman traditions, the dog was said to be three-headed from birth.
The Underworld and Cerberus’s Role
Cerberus stood at the gates of the underworld, the realm of Hades, the god of the dead. The underworld was a shadowy place at the center of the earth, the destination of all who died. It was surrounded by the rivers of the underworld, including the Styx (the river of hate), the Acheron (the river of sorrow), the Lethe (the river of forgetfulness), the Phlegethon (the river of fire), and the Cocytus (the river of wailing).
The gates of the underworld were guarded by Cerberus, who prevented the dead from leaving. The souls of the dead had to present themselves to Cerberus, who would sniff them and, if he found them acceptable, allow them to pass into the realm of Hades. If they tried to leave, he would devour them.
The underworld was ruled by Hades and his queen Persephone. The souls of the dead were judged by three judges: Minos, Rhadamanthys, and Aeacus. The virtuous were sent to the Elysian Fields, a paradise of perpetual spring. The wicked were sent to Tartarus, a deep pit of torment at the lowest level of the underworld. The majority of souls, who were neither virtuous nor wicked, wandered the Asphodel Meadows, a grey and shadowy place of eternal ennui.
Cerberus in the Twelfth Labor of Heracles
The most famous myth of Cerberus is his capture by Heracles as the twelfth and final of his Twelve Labors. King Eurystheus, having set Heracles eleven impossible tasks, commanded him, as the final labor, to bring Cerberus up from the underworld and show him to the king.
Heracles descended to the underworld, passing through the entrance near the swamp of Lerna, one of the mouths of Hades. He was accompanied by Hermes, the guide of souls, and by Athena, the goddess of wisdom. At the gates of the underworld, he encountered Cerberus.
According to the most familiar version of the myth, Hades agreed to let Heracles take Cerberus on the condition that he subdue the dog without using weapons. Heracles wrestled Cerberus into submission, using only his hands, and brought the dog up to the upper world. Eurystheus was so terrified at the sight of the three-headed dog that he hid in his bronze storage jar and begged Heracles to take the dog back to the underworld. Heracles complied.
In another version, Heracles killed Cerberus, and the dog was then restored to life. In yet another, Heracles gave the dog a sop of poppy and barley, and Cerberus fell asleep.
Cerberus and Orpheus
Cerberus appears in the story of Orpheus, the legendary musician who descended to the underworld to retrieve his dead wife Eurydice. Orpheus, who could charm all living things with his music, sang to Cerberus, and the dog was soothed. Orpheus and Eurydice were allowed to leave the underworld, on the condition that Orpheus not look back at Eurydice before they were both in the sunlight. Orpheus, in his anxiety, looked back, and Eurydice was lost to him forever.
The myth of Orpheus and Cerberus has been a popular subject in art and literature. The image of the musician charming the monster is in Western culture, and it has been retold in countless variations.
Cerberus in the Aeneid
Cerberus appears in Book VI of Virgil’s Aeneid, when Aeneas descends to the underworld to visit his father Anchises. The Sibyl of Cumae, who guides Aeneas, gives him a sop of honey and barley with narcotic herbs. When they reach the gates of the underworld, Aeneas throws the sop to Cerberus, and the dog, ravenous, swallows it and falls asleep. The way is clear for Aeneas to enter the underworld.
Virgil’s description of Cerberus is in Latin literature. The monster is described as a “vast and terrible” beast with three heads and a loud bark that fills the entrance to the underworld.
Cerberus in Other Myths
Cerberus appears in several other myths. In one tradition, the witch Medea — who in myth is associated with magical herbs, rejuvenation, and the journey to Colchis — was credited in later sources with knowing the herbs that could lull the watchdog. In another, Aeneas’s trumpeter, Misenus, was drowned by Triton, and his soul was led down to the underworld by the sound of a trumpet. In yet another, the soul of the dead was accompanied by Hermes, who served as the guide.
In some traditions, Cerberus was said to be friendly to those who entered the underworld, but ferocious to those who tried to leave. The dog was also said to be friendly to musicians, particularly Orpheus, and to strangers who brought him food.
Cerberus in Greek Art
Cerberus was a popular subject in Greek art, particularly in vase paintings and reliefs depicting the descent of Heracles. The dog is usually shown with three heads, a serpent tail, and a fierce expression. The most famous surviving depiction is the metope from the temple of Zeus at Olympia, which shows Heracles holding up the three-headed dog while he wrestles it.
In later Greek and Roman art, Cerberus is often shown at the feet of Hades, accompanying the dead. He appears on countless funerary reliefs, sarcophagi, and mosaics, always as a guardian of the underworld.
The Legacy of Cerberus
Cerberus appears in the Percy Jackson series, the Hades video game (where he is a memorable recurring character named Cerberus), and the God of War franchise, and is a transparent reference for Fluffy, the three-headed dog in J.K. Rowling’s Harry Potter and the Philosopher’s Stone. The phrase ‘a sop to Cerberus’ has entered English as a description of a bribe. For the broader modern reception, see our guide to Greek mythology in modern culture.
A Note on Reading This Profile
A note on reading this profile. Cerberus of the Greek sources is a much more frightening figure than the modern popular Cerberus. The Odyssey (Book XI) treats him as a dangerous animal, and the Iliad (Book VIII) treats him as the creature the dogs of Hades outnumber. The Bibliotheca of Apollodorus (2.5.12) is the most complete account of the twelfth Labor of Heracles. The modern three-headed Cerberus is a tamer version, and the reader who wants the original should consult the Iliad and the Odyssey directly.