Shelley, Bruce (2014). Church History in Plain Language. Nashville, TN: Thomas Nelson
Hamilton, Adam (2007). Christianity's Family Tree. Nashville, TN: Abington Press
Van Doren, Charles (1991). A History of Knowledge. New York, NY: Ballantine Books
Aurelius, Marcus (170). Meditations.
PBS FrontLine, From Jesus to Christ, the First Christians. 1998
PBS FrontLine, Ancient Roads, from Christ to Constantine. 1998
Amazon Prime Video, History of Christianity