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Charles IV, duke of Lorraine

(Encyclopedia)Charles IV, 1604–75, duke of Lorraine. He succeeded to the duchy in 1624 but was to lose it several times because of his anti-French policy. In 1633, French troops invaded Lorraine in retaliation fo...

Ferdinand IV, king of Naples

(Encyclopedia)Ferdinand IV, king of Naples: see Ferdinand I, king of the Two Sicilies. ...

Philip IV, king of France

(Encyclopedia)Philip IV (Philip the Fair), 1268–1314, king of France (1285–1314), son and successor of Philip III. The policies of his reign greatly strengthened the French monarchy and increased the royal reve...

Raymond IV, count of Toulouse

(Encyclopedia)Raymond IV, c.1038–1105, count of Toulouse (1093–1105), leader in the First Crusade (see Crusades). He was also count of Saint Gilles and marquis of Provence. The first great prince to take the Cr...

Rama IV, king of Siam

(Encyclopedia)Rama IV: see Mongkut.

Otto IV, Holy Roman emperor

(Encyclopedia)Otto IV, 1175?–1218, Holy Roman emperor (1209–15) and German king, son of Henry the Lion, duke of Saxony. He was brought up at the court of his uncle King Richard I of England, who secured his ele...

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), ...

Peter IV, king of Portugal

(Encyclopedia)Peter IV, king of Portugal: see Pedro I, emperor of Brazil. ...

Wenceslaus IV, king of Bohemia

(Encyclopedia)Wenceslaus IV, king of Bohemia: see Wenceslaus, Holy Roman emperor. ...

Pius II

(Encyclopedia)Pius II pīˈəs [key], 1405–64, pope (1458–64), an Italian named Enea Silvio de' Piccolomini (often in Latin, Aeneas Silvius), renamed Pienza after him, b. Corsigniano; successor of Calixtus III....