Patristics/Early Church History

Lexikon der christlichen Antike. by Bauer, Johannes B., Manfred Hutter, and Anneliese Felber.

A Dictionary of Early Christian Beliefs by David Bercot (Editor)

Encyclopedia of Ancient Christianity by Angelo. Di Berardino (General Editor); Thomas C. Oden (Consultant Editor); Joel C. Elowsky (Consultant Editor); James Hoover (Consultant Editor)

Nuovo dizionario patristico e di antichità cristiane

The Early Christian World by Philip F. Esler (Editor)

Encyclopedia of Early Christianity by Everett Ferguson (Editor)

The Oxford Dictionary of Byzantium by Alexander P. Kazhdan (Editor)

A Concise Dictionary of Early Christianity by Joseph F. Kelly

Reallexikon für Antike und Christentum : Sachwörterbuch zur Auseinandersetzung des Christentums mit der antiken Welt / in Verbindung mit Franz Joseph Dölger und Hans Lietzmann und unter besonderer Mitwirkung von Jan Hendrik Wasznik und Leopold Wenger hera by Klauser, Theodor et al, eds.

The Westminster Handbook to Patristic Theology by John Anthony McGuckin

A dictionary of Christian biography, literature, sects and doctrines : being a continuation of "The dictionary of the Bible" by William Smith and Henry Wace, eds.