Pythagoras was born in 570 BC on the island of Samos in what is now Turkey. He traveled extensively in his youth to Egypt and India to study with various teachers. Pythagoras founded a school in Croton, Italy around 530 BC where he taught his beliefs that mathematics and music were deeply interconnected and could explain the order of the universe. He is most famous for 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, though he may not have discovered it himself. Pythagoras made important contributions to both music and astronomy.