Saint Catherine Disputing and Two Donors, possibly ca. 1380, Tempera on wood, gold ground, Overall, with engaged frame, 22 3/4 x 18 1/4 in. (57. 8 x 46. 4 cm) ; painted surface 21 1/4 x 16 3/4 in. (54 x 42. 5 cm), Paintings, Cenni di Francesco di Ser Cenni (Italian, Florence, active by 1369?died 1415), A princess of great learning and beauty, Saint Catherine of Alexandria (fourth century) was challenged to a debate with fifty pagan orators, all of whom she converted to Christianity. Here she counts off the points of her dispute to two men who wear haloes as an indication of their conversion by her arguments (and future martyrdom by Emperor Maxentius)