The paintings in the spandrels (1710-1716) are of Sibilla and St. Luke. The intrados of the arch, painted in monochrome are: Pentecost, the Assumption (right) and the Resurrection (left). There are also symbols of the Eucharist. In the vault, the Trinity and angels; St. Andrea and St. Carlo Borromeo; the Baptism of Jesus; all from the 18th century restoration.