King of Greece (1913–1917) who opposed the Allies in World War I and was forced to abdicate. He returned to the throne in 1920 but abdicated again (1922) after a military rebellion.
Known as “Constantine the Great.” Originally Flavius Valerius Constantinus. AD 285?–337.
Emperor of Rome (306–337) who adopted the Christian faith and suspended the persecution of Christians. He rebuilt Constantinople (now Istanbul) as the new Rome (330).