The Parthenon’s columns lean inward to create a perfect visual illusion
Ancient Greek architects intentionally tilted the Parthenon’s massive columns and curved its floors to counteract natural optical distortions, making the temple appear perfectly straight and stable to the human eye.
The Parthenon features a sophisticated design technique called entasis to achieve its legendary symmetry. Architects Ictinus and Callicrates realized that long, straight lines often appear to sag or bow when viewed from a distance. To fix this, they built the temple with no truly straight lines; the floor curves upward in the center and every column leans slightly inward.
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