 Legend states that the writers depicted here are Homer, Empedocles, Lucan, Horace, Ovid, Virgil and Dante, but the identifications are disputed by modern scholars.Several small-scale grisaille medallions depicting images from their works, including the first eleven books of Dante's Purgatorio, Orpheus, Hercules, and various scenes from Ovid and Virgil, among others.In a niche in the lower wall is shown a Pietà that contains explicit references to two important Orvietan martyr saints, S. Pietro Parenzo (podestà of Orvieto in 1199) and S. Faustino.