Flavius Valerius Aurelius Constantinus; "the Great", a.d. 288?–337, Roman emperor 324–337: named Constantinople as the new capital; legally sanctioned Christian worship.
1868–1923, king of Greece 1913–17, 1920–22.
- Con·stan·tin·i·an [kon-stuhn-tin-ee-uhn], /ˌkɒn stənˈtɪn i ən/, adjective
- post-Con·stan·tin·i·an, adjective
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How to use Constantine I in a sentence
The real turning-point had been reached earlier, when Christianity became the state religion under Constantine I. in 312.
Under Constantine I. it was included in the “prefecture” of Illyricum.
British Dictionary definitions for Constantine I
known as Constantine the Great. Latin name Flavius Valerius Aurelius Constantinus. ?280–337 ad, first Christian Roman emperor (306–337): moved his capital to Byzantium, which he renamed Constantinople (330)
1868–1923, king of Greece (1913–17; 1920–22): deposed (1917), recalled by a plebiscite (1920), but forced to abdicate again (1922) after defeat by the Turks
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