Born Donate di Niccolo di Betto Bardi, at Florence, Italy, about 1386, better known as Donatello, was an Italian sculptor. Donatello was the greatest Italian sculptor of the early part of the 15th century and one of the most important artists of the Renaissance. The intensity and realism of his works broke sharply with the medieval tradition and influenced many later sculptors and painters. His accurate representation of human anatomy and spatial perspective was one of the earliest attempts to use scientific knowledge in Renaissance art. Donatello's most famous works include the bronze David (Bargello, Florence) and the equestrian statue of Gattamelata (Padua). Donatello began his career as an apprentice to the sculptor Lorenzo Ghiberti. Much of his early work was commissioned for the cathedral in Florence and the guild church of Or San Michele. One of his earliest masterpieces was the statue of St. George, now in the Bargello. During the late 1420's and early 1430's, Donatello traveled through Italy and studied Classical art. The bronze David and another, unfinished David in marble (National Gallery, Washington, D.C.) are thought to have been made during this Classical period. Donatello died in Florence in 1466.