Synonyms for Constantine The Great (same or very similar meaning)
WordNet sense 1 (Emperor of Rome who stopped the persecution of Christians and in 324 made Christianity the official religion of the empire; in 330 he moved his capital from Rome to Byzantium and renamed it Constantinople (280-337)):
Constantine, Constantine I, Flavius Valerius ConstantinusFrom the ODE community, based on WordNetadd/edit