Who Was Medusa in Greek Mythology?

In the earliest sources Medusa is simply one of three gorgon sisters, monstrous from birth, with the crucial detail that she alone was mortal while the other two were not. There is no origin story and no transformation.

She is described with snakes for hair, sometimes with tusks and wings, and the power to petrify with a look. Early Greek art shows her as a broad grotesque face rather than a beautiful one, used widely as a protective image on shields, buildings and pottery.

The version most people know comes much later, from the Roman poet Ovid writing around the beginning of the first century. In it Medusa was originally a beautiful mortal woman who was assaulted by Poseidon in Athena's temple.

Athena then transformed her into a monster. Whether this is presented as punishment or as something more ambiguous has been argued over for centuries, and it is this version that has driven modern reinterpretations of Medusa as a figure of injustice rather than simply a monster.

Perseus was sent to fetch Medusa's head, an errand designed to kill him. He succeeded with help from the gods, who supplied him with the equipment needed:

• •A polished shield used as a mirror, so he never met her gaze directly
• •Winged sandals for speed and escape
• •A cap of invisibility
• •A sword strong enough for the task

The head kept its power after death, which is the detail that makes the myth work as a story rather than ending it. Perseus used it as a weapon, turning enemies to stone, including a sea monster threatening Andromeda.

He eventually gave it to Athena, who set it on her shield. This closes a loop, since the gorgon face was already used as a protective emblem in real Greek practice long before the story was written down in this form.

Few mythological figures have been reworked as much. The image of a woman punished for something done to her, then made monstrous and finally decapitated by a hero, has been picked up by writers and artists as a symbol of blame and silencing.

It is worth being precise about what the sources actually say. The transformation story is Roman and late, not part of the earliest Greek material, and the earliest Medusa is a monster with no backstory. Both versions are real parts of the tradition, and knowing which one you are discussing avoids a lot of confusion.

When Perseus struck off Medusa's head, two figures sprang from her blood: the winged horse Pegasus and a warrior named Chrysaor. Both are described as her children by Poseidon.

Pegasus went on to appear in other myths, most notably carrying the hero Bellerophon against the Chimera before throwing him when he attempted to fly to Olympus. The detail matters because it makes Medusa the origin of one of Greek mythology's most enduring images, which sits oddly with her usual role as a monster to be destroyed and forgotten.

Medusa was originally simply a mortal gorgon whose gaze turned people to stone, and the widely known story of her transformation comes from a much later Roman retelling that has shaped almost every modern interpretation of her.