orig. Stefano di Giovanni
died 0441; 1450, Siena, Republic of Siena
Italian painter.
His interest in Florentine art is evident in his monumental Madonna of the Snow altarpiece for Siena Cathedral (143032) and in his most ambitious work, an altarpiece for San Francesco at Sansepolcro (143744). His fusion of traditional and contemporary elements transformed Sienese painting from the Gothic to the Renaissance style, and he is considered one of the greatest Sienese painters of the 15th century.