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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. ...

Commodus

(Encyclopedia)Commodus (Lucius Aelius Aurelius Commodus) kŏmˈədəs [key], 161–192, Roman emperor (180–192), son and successor of Marcus Aurelius. In 180, reversing his father's foreign policy, he concluded p...

John IV, Byzantine emperor of Nicaea

(Encyclopedia)John IV (John Lascaris) lăsˈkərĭs [key], b. c.1250, d. after 1273, Byzantine emperor of Nicaea (1258–61), son and successor (under a regency) of Theodore II and last of the Lascarids. Michael Pa...

Baldwin IV, Latin king of Jerusalem

(Encyclopedia)Baldwin IV (Baldwin the Leper), c.1161–1185, Latin king of Jerusalem (1174–85), son and successor of Amalric I. Raymond, count of Tripoli, was regent from 1174 to 1176. Baldwin was constantly enga...

Frederick IV, king of Denmark and Norway

(Encyclopedia)Frederick IV, 1671–1730, king of Denmark and Norway (1699–1730), son and successor of Christian V. He allied himself (1699) with Augustus II of Poland and Saxony and with Peter I of Russia against...

Gregory I, Saint

(Encyclopedia)Gregory I, Saint (Saint Gregory the Great), c.540–604, pope (590–604), a Roman; successor of Pelagius II. A Doctor of the Church, he was distinguished for his spiritual and temporal leadership. Hi...

Byzantine music

(Encyclopedia)Byzantine music, the music of the Byzantine Empire composed to Greek texts as ceremonial, festival, or church music. Long thought to be only a further development of ancient Greek music, Byzantine mus...

legion

(Encyclopedia)legion, large unit of the Roman army. It came into prominence c.400 b.c. It originally consisted of 3,000 to 4,000 men drawn into eight ranks: the first six ranks, called hoplites, were heavily armed,...

Conrad IV, ruler of the Holy Roman Empire

(Encyclopedia)Conrad IV, 1228–54, German king (1237–54), king of Sicily and of Jerusalem (1250–54), son of Holy Roman Emperor Frederick II. He was elected (1237) king of the Romans at his father's instigation...