He was first taught in his native Arezzo by the little-known French glass painter and fresco painter, Guillaume de Marcillat (1475-1529 or 1537). By 1524, he had moved to Florence, where he worked for Andrea del Sarto (1486-1530), in whose studio he became acquainted with Francesco Salviati (1510-1563). During his early training in Florence, he met Michelangelo (1475-1564) and Baccio Bandinelli (1