He was on intimate terms with St. Ignatius Loyola and was highly esteemed by pope Julius III. His commentary on the "Letters of Cicero" is one of the best. He also wrote: "De inscriptionibus et imaginibus veterum numismatum".
- This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). "Bernardino Maffei". Catholic Encyclopedia. New York: Robert Appleton.
- Cheney, David M. "Bernardino Cardinal Maffei [Catholic-Hierarchy]". www.catholic-hierarchy.org. Retrieved 2017-06-21.