Although the works of Pietro Lorenzetti (1280-1348) rank among the most famous of the fourteenth century, one of his panels, a small Crucifixion, has remained largely overlooked, despite its unique imagery. Combining three temporal horizons--past, present, and eschatological future--within an unparalleled allegorical presentation of the Crucifixion, this panel grants precedence to Clare of Assisi over Francis, founder of the Franciscan Order. Probably...