Giorgio Vasari (1511-1574) was a man of many talents--a sculptor, painter, architect, writer, and scholar--but he is best known for Lives of the Artists, the classic account that singlehandedly invented the genre of artistic biography and established the canon of Italian Renaissance art. Before Vasari's extraordinary book, art was considered a technical skill rather than an intellectual pursuit, and artists were mere decorators and craftsmen. It was through Vasari's visionary writings that artists like Raphael, Leonardo, and Michelangelo came to be regarded as great masters of...