Basic Research Tools

Concise Oxford dictionary of the Christian Church

Creeds and Confessions of Faith in the Christian Tradition

Dictionary of early Christian beliefs

Dictionary of historical theology

Encyclopedia of Catholic Saints

Encyclopedia of Medieval Pilgrimage

Encyclopedia of Protestantism

Encyclopedia of Ancient Christianity

Encyclopedia of early Christianity

Encyclopedia of the Medieval Chronicle

Encyclopedia of the early church

Greek-English Lexicon of the New Testament and Other Early Christian Literature

Historical dictionary of medieval philosophy and theology

History of Christianity and Christian Theology

Jesuit Historiography Online (JHO)

New Catholic Encyclopedia, 2nd ed.

Oxford Classical Dictionary (4th ed., 2012)

Oxford Dictionary of Byzantium

Patristic Greek Lexicon

Reallexikon für Antike und Christentum

Religion Past & Present: Encyclopedia of Theology and Religion

Sacramentum mundi: an encyclopedia of theology

The Encyclopedia of American Catholic History

The Oxford handbook of medieval Christianity

The Westminster handbook to patristic theology

Theotokos : a theological encyclopedia of the Blessed Virgin Mary

Thesaurus Linguae Graecae (University of California, Irvine)  Limitations on Use  Access Instructions

Thesaurus Cultus et Rituum Antiquorum (ThesCRA)

Thesaurus Linguae Latinae online

Vetus Latina Database (Brepols)

Digital Text Collections

Aufstieg und Niedergang der Römischen Welt (De Gruyter)

Corpus Augustinianum Gissense: CAG-online (Zentrum für Augustinus-Forschung)

Digital Library of Classic Protestant Texts (Alexander Street Press)

Digital Library of the Catholic Reformation (Alexander Street Press)

Flavius Josephus Online

John Wyclif: selected Latin works in translation (Manchester University Press)

Library of Latin Texts: Cross Database Searchtool (Brepols)

Medieval History Texts in Translation (University of Leeds)

Past Masters (InteLex)

Patrologia Graeca (Religion and Technology Center, Inc.)

Patrologia Latina (ProQuest)

Patrologia Orientalis Database (Brepols)

RELMIN (Institut du Pluralisme Religieux et de l'Athéisme - IPRA)  Tutorial  Access Instructions

Sources Chrétiennes Online (Brepols)

Thesaurus Linguae Graecae (University of California, Irvine)  Limitations on Use  Access Instructions

Translated Texts for Historians E-Library (Liverpool University)

Key Article Databases