Pythagoras was born in 570 BC in Samos, Greece. He studied in Egypt and Babylon before founding a school in Crotona, Italy around 518 BC where he taught mathematics, philosophy and developed theories on music and ethics. Pythagoras is best known for discovering the Pythagorean theorem, which states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. He died around 495 BC in Metapontum, Italy at around age 75.