Commodilla is an unknown Christian matron, on whose property were buried Saints Felix and Adauctus, martyred during the persecution of Diocletian.
This 4th century frescoe was dicovered in 1953 on the ceiling of an underground corner of the Catacombs of Commodilla. It is of Jesus the Alpha and Omega and is the earliest representation of Christ with a beard. Before this time Jesus was usually depicted as a young beardless man. (Image is from www.religionfacts.com.)