Polycletus, a Greek sculptor, born probably at Sicyon, flourished about 430. He was a citizen of Argos, and is said to have been the pupil of the Argive Ageladas, in whose school Phidias and Myron were his fellow students. He was judged to have surpassed Phidias in images of men, though not in those of the gods. His statue of Juno in the temple between Argos and Mycenae was thought by Strabo to be equal to the Jupiter and Minerva of his great rival. The goddess was seated on a throne, crowned with a garland on which were wrought the Graces and the Hours. The head, breast, arms, and feet were of ivory, and the robe which covered the figure from the waist downward was of gold. A statue which he executed, known as the Spear Bearer, was so exquisitely proportioned that it was called the canon or rule, and artists came from all parts to study it. Polycletus also wrote a treatise on the proportions of the human form. He was acknowledged to be the greatest architect of his time, and designed the theatre at Epidaurus, which Pausanias pronounced the finest of Greek and Roman theatres.