Greek mythology, the three-headed watchdog who guards the
entrance to the lower world, the Hades.
is a child of the giant Typhon and Echidna, a monstrous
creature herself, being half woman and half snake.
Originally, the dog was portrayed having fifty or hundred
heads but was later pictured with only three heads (and
sometimes with the tail of a serpent).
permitted new spirits to enter the realm of dead, but allowed
none of them to leave. Only a few ever managed to sneak
past the creature, among which Orpheus,
who lulled it to sleep by playing his lyre, and Heracles,
who brought it to the land of the living for a while (being
the last of his Twelve Labors).
Roman mythology, the Trojan prince Aeneas and Psyche were
able to pacify it with honey cake.
Greek personification of death who dwells in the lower world.