Guidoccio Cozzarelli: A Florentine Master of Light and Shadow Guidoccio di Giovanni Cozzarelli (1450-1517) stands as a pivotal figure in the artistic landscape of Renaissance Siena, renowned for his masterful blend of meticulous detail and expressive chiaroscuro—a technique that would become synonymous with his distinctive style. Born in Siena amidst the burgeoning intellectual fervor of the era, Cozzarelli’s formative years were spen…