"Oedipus and the Sphinx" by Ingres, from the Louvre, Paris. Black and white lithograph colored by Christopher Rifkind.
Sphinx (sfinks). Monster with the head of a woman, the wings of a griffin and the body of a lion. The Sphinx stopped travelers on the road to Thebes and posed them a riddle. If they answered wrong, they died. The hero Oedipus was asked the following question: "What walks on four legs in the morning, two legs at noon and three at close of day?" Oedipus replied that a human crawls on four legs as an infant, walks upright on two in the prime of life and hobbles with a cane in old age. Hearing this, the Sphinx promptly ran off and killed herself. The grateful people of Thebes made Oedipus their king.

"Oedipus and the Sphinx" by Ingres, from the Louvre, Paris. Black and white lithograph colored by Christopher Rifkind.
Sphinx (sfinks). Monster with the head of a woman, the wings of a griffin and the body of a lion. The Sphinx stopped travelers on the road to Thebes and posed them a riddle. If they answered wrong, they died. The hero Oedipus was asked the following question: "What walks on four legs in the morning, two legs at noon and three at close of day?" Oedipus replied that a human crawls on four legs as an infant, walks upright on two in the prime of life and hobbles with a cane in old age. Hearing this, the Sphinx promptly ran off and killed herself. The grateful people of Thebes made Oedipus their king.