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- Constantine I, Emperor of Rome, -337
- Christianity and politics - Rome - History
- Church - Authority - History of doctrines
- Church history - Primitive and early church, ca 30-600
- Council of Nicaea (1st 325)
- Heresies, Christian - History - Early church, ca. 30-600
- Jesus Christ - Divinity - History of doctrines - Early church, ca. 30-600
- Holy spirit - History of doctrines - Early church, ca. 30-600
- Rome - History - Constantine the Great