Джованни Пизано
The high altar, in marble (1626), has a polychrome wooden crucifix by Giovanni Pisano (early 14th century). At the foot of the altar are two wooden angels from the 15th century, by Domenico di Niccolò dei Cori. Behind it is the "Ark of Saint Cerbonius", which was created in 1342, with reliefs depicting stories of the saint.