Traces of some 13th century frescos- remain on the massive walls in “verrucano” stone, that have been recently restored. They represent scenes from the Gospel, testifying the habit to depict the Holy Histories, in order to make them more understandable to the uneducated believers (Biblia Pauperum). The cycle begins on right aisle wall, where scenes from the Annunciation, the Visitation and the Nativity are recognizable. The next episode is likely that of Erodes commanding the slaughter of the innocents. Above the narrative scenes there are ornamental patterns of spirals and squares alternated with checks, while the bottom is decorated with false draperies. On the internal face of the façade, on the left, two scenes are represented: the top one shows the Baptism of Christ, while on the bottom scene Saint George, the dragon and the Princess are recognizable. On the right, the restored traces of frescos are not interpretable. On the left aisle wall two scenes have been restored: the capture of Christ and the Pentecost. The entire cycle ended with the wood Deposition from the Cross, that concluded Jesus’ passage on earth. The cycle of frescos was covered up between the 16th and 17th century, when the still present big stone altars were positioned against the walls.