The four splendid altars, two on one side and two on the other in four small chapels, were made of stone and decorated with painted glass using a special process to make them look like marble.
To elevate and complete the four chapels, Tommaso Polluce was commissioned to paint three of the four splendid paintings that decorate the altars.
On the right are St. Gertrude and St. Benedict, on the left St. Maurus and the Trinity.
