Over the centuries, several chapels were built on the baptistery's perimeter wall. The small chapel to the left of the entrance was built in the 14th century, and it houses particularly valuable frescoes. The pictorial cycle is likely the work of Roberto d'Oderisio, an artist active in the Salerno area in the second half of the 14th century, who was heavily inspired by Giotto's Neapolitan works. On the right side, four significant episodes from the life of Christ are depicted: the Nativity (following Byzantine iconography), the Massacre of the Innocents, the Ascent to Calvary, and the Descent into Hell. The barrel vault features a Christ Pantocrator, set within a mandorla. On the left side, a Madonna enthroned is shown holding the infant Jesus in her arms, who holds a scroll inscribed with the gospel verse “Ego sum via” (“I am the way”). Next to this is the scene of the empty tomb according to Matthew’s version: the angel, seated on the tomb, announces Christ’s resurrection to the two women.