The inscription around the elaborate gold clasp holding her cloak gives her name, but 14th-century viewers would have immediately recognized Saint Catherine of Alexandria by the book she holds and the spiked wheel before her. Legends of the fourth-century Egyptian martyr made her one of the most popular saints of the Middle Ages. A beautiful girl from a royal family, she was baptized following a dream in which the infant Jesus gave her a ring. As the bride of Christ, she rejected a temporal marriage to the Roman emperor Maxentius and protested his persecution of Christians. When famous philosophers were sent to convince her of the errors of her faith, she confounded them with her knowledge, but she was still sentenced to be torn apart between spiked wheels. When the moment came, miraculously, the wheels burst into flames, but she was beheaded anyway. Catherine was considered an especially potent intercessor for human prayers, protector of the dying, and patron of students.
This painting was once part of an altarpiece that stood in the church of San Cerbone, in the Tuscan town of Lucca (see Saint Catherine of Alexandria). It is the work of Bartolomeo Bulgarini, one of the most renowned painters in mid-14th century Siena, less than one hundred miles from Lucca, where other panels from this altarpiece survive. His style reflects two great Sienese artists of the earlier generation: the decorative brilliance of Duccio di Buoninsegna (Sienese, c. 1250/1255 - 1318/1319) and the simple, heavier figures and tender humanity of Pietro Lorenzetti (Sienese, active 1306 - 1345).