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Ephesus, Council of

(Encyclopedia)Ephesus, Council of, 431, 3d ecumenical council, convened by Theodosius II, emperor of the East, and Valentinian III, emperor of the West, to deal with the controversy over Nestorianism. Adherents of ...

Theodosius II

(Encyclopedia)Theodosius II, 401–50, Roman emperor of the East (408–50), son and successor of Arcadius. He preferred the study of theology and astronomy to public affairs, which he left to the guidance of his s...

Frederick III, elector palatine

(Encyclopedia)Frederick III (Frederick the Pious), 1515–76, elector palatine (1559–76). The first German prince to accept Calvinism, he ordered the Heidelberg Catechism (1563) drawn up (see under Heidelberg). H...

Michael III, Byzantine emperor

(Encyclopedia)Michael III (Michael the Amorian or Phrygian), 836–67, Byzantine emperor (842–67), son and successor of Theophilus and grandson of Michael II. His minority saw the final overthrow of iconoclasm an...

Muhammad III, Ottoman sultan

(Encyclopedia)Muhammad III or Mehmet III, 1567–1603, Ottoman sultan (1595–1603), son and successor of Murad III to the throne of the Ottoman Empire (Turkey). Muhammad, who was a provisional governor under his f...

Medici, Cosimo III de'

(Encyclopedia)Medici, Cosimo III de', 1642–1723, grand duke of Tuscany (1670–1723); son and successor of Ferdinand II de' Medici. During his long reign the government of Tuscany degenerated into bigoted and cor...

Leo III, Saint, pope

(Encyclopedia)Leo III, Saint, pope (795–816), a Roman; successor of Adrian I. He was attacked about the face and eyes by members of Adrian's family, who hoped to render him unfit for the papacy. Leo recovered and...

Leo III, Byzantine emperor

(Encyclopedia)Leo III (Leo the Isaurian or Leo the Syrian), c.680–741, Byzantine emperor (717–41). He was probably born in N Syria (rather than in Isauria, as once thought). He held diplomatic and military post...

Louis III, French king

(Encyclopedia)Louis III, c.863–882, French king, son of King Louis II. He became joint ruler with his brother Carloman on the death of Louis II (879), despite the attempts of Louis the Younger to become French ki...