The Open Access Digital Theological Library (OADTL) curates content in religious studies and related disciplines from publisher websites, institutional repositories, scholarly societies, archives, and stable public domain collections.

Searchable encyclopedia providing "full and authoritative information on the entire cycle of Catholic interests, action and doctrine"

(Archived version) Translations of primary documents about early and medieval Christianity (No longer updated - see here archived version of site)

Web site maintained by medieval scholars which contains the "Orb Encyclopedia," an index of original essays on medieval studies arranged by topic, a dictionary of medieval terms, online bibliographies and time lines, and links to medieval internet resources.

This website gives a list of religious movements (including Christian denominations) around the world in alphabetic order.

A web site sponsored by Georgetown Univeristy providing organized access to electronic resources in medieval studies.