The Creed plays a fundamental role in the rite of Baptism, for it summarizes the profession of faith to which the catechumen adheres. Even though a rather unusual theme in Italian painting, in Siena it was a frequent topic, as attested by the inlaid choir stalls in the interior chapel of Palazzo Pubblico, made between 1415 and 1428 by Niccolò dei Cori, and the frescoes in the Chapel of the Nail . . .