Early Church Personalities: Constantine †May 337
- Constantine
- The Emperor's New Religion - Bruce Shelley - Christian History, Winter 1998 - The story of early Christianity's most famous—and most controversial—convert.
- Constantine I Roman emperor. The Columbia Encyclopedia Sixth Edition. 2001
- Constantine the Great - Catholic Encyclopedia
- History of Constantine the Great - Resources for Constantine the Great
- Roman Emperors - DIR Constantine I
- Roman Emperors - Bust of the Emperor Constantine
- Constantine - Statue of the Emperor Constantine, from York, England.
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