The Last Supper, ca. 1325?30, Tempera and gold on wood, Overall, with engaged (modern) frame, 15 x 22 1/4 in. (38. 1 x 56. 5 cm) ; painted surface 13 1/2 x 20 3/4 in. (34. 3 x 52. 7 cm), Paintings, Ugolino da Siena (Ugolino di Nerio) (Italian, Siena, active by 1317?died? 1339/49), Ugolino da Siena was the most original and accomplished follower of Duccio di Buoninsegna, the greatest Sienese painter of the fourteenth century. Among Ugolino's most important commissions was the multi-panel altarpiece for the high altar of Santa Croce, the Franciscan church in Florence