# In what year was the Pythagorean Theorem developed?

The Pythagorean Theorem was known to the Babylonians about $1000$ years before Pythagoras was born, though Pythagoras is credited with the first recorded proof.
Though we name this theorem after the Greek mathematician Pythagoras who lived approximately $570 - 495$ BC, it was known and recorded by the Babylonian mathematicians about $1000$ years earlier. It was also discovered independently by other ancient civilisations in Mesopotamia, India and China.