the manuscript of Alberti's Della pittura, or On Painting, completed in 1435, documents Brunelleschi's theories of perspective. It was dedicated to the five young artists of Florence whom Alberti's most admired and who came closest to creating a personal style that reflected the art of ancient Rome. we now regard these five-Brunelleschi, the sculptor Ghiberti, the painter Masaccio, and the sculptors Donatello and Luna Della Robbia (1399-1482)-as among the founders of the Renaissance.