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Leo IV, Byzantine emperor
(Encyclopedia)Leo IV (Leo the Khazar), d. 780, Byzantine emperor (775–80), son and successor of Constantine V. He owed his nickname to his mother, a Khazar princess. Leo tempered the iconoclastic excesses of his ...Bohemond I
(Encyclopedia)Bohemond I bōˈhəmŏnd [key], c.1056–1111, prince of Antioch (1099–1111), a leader in the First Crusade (see Crusades); elder son of Robert Guiscard. With his father he fought (1081–85) agains...Martin IV, d. 1285, pope
(Encyclopedia)Martin IV, d. 1285, pope (1281–85), a Frenchman named Simon de Brie; successor of Nicholas III. He was chancellor under Louis IX of France and was created cardinal by Urban IV. He was thus a support...Frederick William IV
(Encyclopedia)Frederick William IV, 1795–1861, king of Prussia (1840–61), son and successor of Frederick William III. A romanticist and a mystic, he conceived vague schemes of reform based on a revival of the m...Leo IV, Saint, pope
(Encyclopedia)Leo IV, Saint, d. 855, pope (847–55), a Roman; successor of Sergius II. He had seen the Saracen attack on Rome (846), and to prevent its recurrence he fortified the city and its suburbs. He built a ...Charles IV, king of France
(Encyclopedia)Charles IV (Charles the Fair), 1294–1328, king of France (1322–28), youngest son of Philip IV, brother and successor of Philip V. Charles continued his brother's work of strengthening the royal po...Peter IV, king of Aragón
(Encyclopedia)Peter IV (Peter the Ceremonious), 1319?–1387, king of Aragón and count of Barcelona (1336–87); son and successor of Alfonso IV. He supported Alfonso XI of Castile at the battle of Tarifa (1340), ...Rama IV, king of Siam
(Encyclopedia)Rama IV: see Mongkut.Charles IV, king of Spain
(Encyclopedia)Charles IV, 1748–1819, king of Spain (1788–1808), second son of Charles III, whom he succeeded in place of his imbecile older brother. Unlike his father, Charles IV was an ineffective ruler and in...Wenceslaus IV, king of Bohemia
(Encyclopedia)Wenceslaus IV, king of Bohemia: see Wenceslaus, Holy Roman emperor. ...Browse by Subject
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