The Madonna and Child are flanked by diminutive figures of Saints John the Baptist and Francis of Assisi while the nine choirs of heavenly angels—as described by the fifth-century neo-platonic writer known as the Pseudo-Dionysius—ornament the pinnacle. Other saints are shown in an arcade. Lippo attains a refinement of execution equal to that of his famous brother-in-law Simone Martini. The panel formed a diptych with a Crucifixion (Musée du Louvre, Paris). Its frame is modern.