Donato di Niccolò di Betto Bardi (c. 1386 – December 13, 1466), better known as Donatello, was the most important early Renaissance sculptor from Florence. He studied classical sculpture, and used this to develop a fully Renaissance style in sculpture, which his periods in Rome, Padua and Siena introduced to other parts of Italy over his long and productive career. He worked in stone, bronze, wood, clay, stucco and wax, and had several assistants, with four perhaps a typical number.