The Greek Sphinx: Oedipus, the riddle and the road to Thebes

By History Hogs

Published 16 OCT 2023

Last updated 7 November 2026

Ancient Greece Ancient Religion and Mythology

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The Sphinx brings Thebes a question with a lethal penalty. Those who cannot answer become her victims; the person who solves it can win the kingdom. Oedipus succeeds, but the reward draws him further into the disaster he has been trying to avoid. Library 3.5.7–9.

That makes the Greek Sphinx more than a mascot for clever riddles. She is the hinge between Oedipus's apparent rescue of a city and his unwitting destruction of his own family.

A Greek monster, an Egyptian image and different jobs

In the Library attributed to Apollodorus, the Sphinx has a woman's face, the body, feet and tail of a lion, and a bird's wings. Hera sends her to Thebes, and the Muses teach her the riddle. Her parents in this account are Echidna and Typhon. These details belong to this version; they need not be padded with every alternative genealogy or divine sender. Library 3.5.8.

Sphinx imagery has a much wider history than this story. The Metropolitan Museum's Egyptian Sphinx of Hatshepsut, dated around 1473–1458 BCE, combines a lion's body with the pharaoh's human head, nemes headcloth and false beard. It was one of a group at her mortuary temple. That is a royal image in an Egyptian setting, not Oedipus's adversary waiting for the next traveller. Metropolitan Museum, Sphinx of Hatshepsut.

Nor were all Greek sphinxes hostile riddlers. A Greek marble example at the Met, dated around 530 BCE, originally crowned the grave marker of a youth and a little girl. The museum describes the Greek winged female sphinx as a guardian used on grave monuments, within a longer eastern Mediterranean history of related forms. Traces of its original red, black and blue paint survive. Metropolitan Museum, sphinx finial.

Those examples make a simple 'Egyptian guardian versus Greek killer' contrast too neat. The image could protect a grave in Greek art even though the individual Sphinx in the Theban story kills people. Shared lion-and-human features also do not establish that Egyptians told the same riddle tale.

What was the Sphinx's riddle?

The Library gives a creature with one voice that moves on four feet, then two, then three. Oedipus identifies it as a human being: crawling in infancy, walking upright in adulthood and using a staff in old age. This is a paraphrase of the ancient riddle rather than a claim to one fixed English wording. Library 3.5.8.

In that account, the Sphinx sits on Mount Phicium and kills Thebans who fail. After many deaths, including that of his son Haemon, Creon offers both the kingdom and Laius's widow to whoever can solve the problem. Oedipus arrives as an outsider, not as the reigning king. Once he answers, the Sphinx throws herself from the citadel.

Victory leads into the Oedipus tragedy

Oedipus receives the promised throne and marries the widow, Jocasta. He does not know that she is his mother, or that the man he recently killed on the road was Laius, his father. The solution to the riddle has removed an immediate danger while putting him in the position where his earlier actions will be revealed. Library 3.5.7–9.

It is tempting to read the episode simply as intelligence defeating force. That describes the encounter, but leaves out its consequences. Oedipus can recognise the human life cycle in an elaborate puzzle while failing to recognise his own place in his family. The irony gives the Sphinx's defeat its lasting sting.