- Christianity: The First Three-Thousand Years | Diarmaid MacCulloch
- Documents of the Christian Church | Henry Bettenson & Chris Maunder
- Introduction to Christianity | Cardinal Joseph Ratzinger
- The Modern Middle East: A History | James Gelvin
- A History of God: The 4000 Year Quest of Judaism, Christianity, and Islam | Karen Armstrong
Journals
- Journal of Religious History | Wiley-Blackwell
- Journal of Early Christian Studies | Johns Hopkins University Press
- Studies in World Christianity | Edinburgh University Press
- Journal of Ecclesiastical History | Cambridge University Press
- Journal of Church and State | Oxford University Press
- European Journal of Theology | Patemoster Periodicals
Classics
- Summa Theologica | Thomas Aquinas
- Confessions | Augustine
- The City of God | Augustine
- On Christian Doctrine | Augustine
- On Nature | Pelagius
- Defense of the Freedom of Will | Pelagius
- On Faith | Ambrose
- Vulgate | Jerome
- Chronicon | Jerome
- Institutes of the Christian Religion | John Calvin
- Ninety-Five Theses | Martin Luther
- On the Freedom of a Christian | Martin Luther
- On the Bondage of Will | Martin Luther
Supplemental Readings and Resources
- Women’s Lives in Medieval Europe: A Sourcebook | Emilie Amt
- Christian Thought: A Historical Introduction | Chad Meister &James Stump
- Contesting Christendom: Readings in Medieval Religion and Culture | Georges Duby
- Christian Symbol and Ritual: An Introduction | Bernard Cooke
- Companion to Religion in Late Antiquity | Augustine Casiday
- Christianity and Culture in the Middle Ages: Essays in Honor of John Van Engen | Ruth Mazzo Karras
- The Hidden History of Women’s Ordination: Female Clergy in the Medieval | Gary Macy
- A History of the Churches in the United States and Canada | Robert T. Handy