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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), ...

Berenice, b. c.340 b.c., d. 281 or 271 b.c., consort and half-sister of Ptolemy I, king of ancient Egypt

(Encyclopedia)Berenice bĕrənīˈsē [key], b. c.340 b.c., d. 281 or 271 b.c., consort and half-sister of Ptolemy I, king of ancient Egypt. A Macedonian, she was the widow of Philip, one of the officers of Alexand...

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. ...

Peter IV, king of Portugal

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

Charles IV, king of Hungary

(Encyclopedia)Charles IV, king of Hungary: see Charles I, emperor of Austria. ...