Database of Religious History
The DRH is a massive, standardized, searchable encyclopedia of the current best scholarly opinion on historical religious traditions and the historical record more generally.
Diachronic
The Catholic Research Resources Portal
Search providing freely available access to rare, unique and/or uncommon materials related to Catholicism in libraries, seminaries, special collections, and archives from around the world.
Vatican Archive and Library
Holdings from the Vatican Library and document archives that have been digitized and made accessible.
Christianity in Icons, Murals, and Mosaics
Database of images of Orthodox religious art, browsable by topic, school, artist, region, manuscript source, and location.
Eastern Orthodox Church Library Research Guide, University of St. Thomas Library
Bibliography of links to works available online on various topics, regions, and periods of the history of Christianity.
History of Christianity Reading Room, Tyndale Seminary
Bibliography of links to works available online on various topics, regions, and periods of the history of Christianity.
Dictionary of African Christian Biography
Digital, open-access resource that uses biography to document the 2000 year history of Christianity in Africa; biographical figures include men and women, clergy and lay people, Africans and expatriates from around the world.