- Flavius Valerius Aurelius Constantinusthe 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.
- 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
Constantine the Great
A Roman emperor of the fourth century. He founded Constantinople as capital of the eastern part of the Roman Empire. Early in his reign, Constantine issued a document allowing Christians (see also Christian) to practice their religion within the empire. Before that, they had frequently been persecuted.