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Charles IV, Holy Roman emperor

(Encyclopedia)Charles IV, 1316–78, Holy Roman emperor (1355–78), German king (1347–78), and king of Bohemia (1346–78). The son of John of Luxemburg, Charles was educated at the French court and fought the E...

Adrian IV, pope

(Encyclopedia)Adrian IV, d. 1159, pope (1154–59), an Englishman (the only English pope), b. Nicholas Breakspear at Langley, near St. Albans. He was successor of Anastasius IV. At an early age he went to France. T...

Ivan IV

(Encyclopedia)Ivan IV or Ivan the Terrible, 1530–84, grand duke of Moscow (1533–84), the first Russian ruler to assume formally the title of czar. In his later years, Ivan's character, always stern, grew tyra...

Muhammad IV, Ottoman sultan

(Encyclopedia)Muhammad IV or Mehmet IV, 1641–92, Ottoman sultan (1648–87). He was proclaimed sultan of the Ottoman Empire (Turkey) by the corps of Janissaries after the deposition and murder of his father, Sult...

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 ...

Housing and Urban Development, United States Department of

(Encyclopedia)Housing and Urban Development, United States Department of (HUD), established 1965 to coordinate and administer programs that provide assistance for housing and community development. The department a...

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), ...