Resources in Church History
- Byzantine & Medieval Studies Sites (Fordham Uiversity)
- Dumbarton Oaks Byzantine Studies
- Ecole Initiative: Hypertext Encyclopedia of Early Church History to 1500
- ICL Net: A Guide to Early Christian Documents
- De Imperatoribus Romanis: An Online Encyclopedia of Roman Emperors
- The Labyrinth: A World Wide Web Server for Medieval Studies
- Russian Orthodox Church during the years of persecution 1917-1955: Bishops and Dioceses, Martyrs and Confessors (Database in Russian)