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Michael II, Byzantine emperor

(Encyclopedia)Michael II (Michael the Stammerer), d. 829, Byzantine emperor (820–29). A native of Phrygia, he fought with Emperor Leo V, whom he had helped gain the throne. Leo had him arrested for heading a cons...

Nicholas V, pope

(Encyclopedia)Nicholas V, 1397–1455, pope (1447–55), an Italian named Tommaso Parentucelli, b. probably Sarzana, Liguria; successor of Eugene IV. From Eugene IV he inherited the antipapal enactments of the Coun...

John III, Byzantine emperor of Nicaea

(Encyclopedia)John III (John Ducas Vatatzes) do͝oˈkəs vətătˈzēz [key], d. 1254, Byzantine emperor of Nicaea (1222–54), successor and son-in-law of Theodore I. He extended his territory in Asia Minor and th...

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...

emperor

(Encyclopedia)emperor [Lat. imperator=one holding supreme power, especially applied to generals], the sovereign head of an empire. In the Roman republic the term imperator referred to the chief military commander a...

Ferdinand I, Holy Roman emperor

(Encyclopedia)Ferdinand I, 1503–64, Holy Roman emperor (1558–64), king of Bohemia (1526–64) and of Hungary (1526–64), younger brother of Holy Roman Emperor Charles V. Brought up in Spain, he was expected to...

John V, king of Portugal

(Encyclopedia)John V (John the Magnanimous), 1689–1750, king of Portugal (1706–50), son and successor of Peter II. Before his accession the Methuen Treaty (1703) with England had brought Portugal into the War o...

Henry V, Holy Roman emperor and German king

(Encyclopedia)Henry V, 1081–1125, Holy Roman emperor (1111–25) and German king (1105–25), son of Henry IV. Crowned joint king with his father in 1099, he put himself at the head of the party desiring reconcil...

Celestine V, Saint

(Encyclopedia)Celestine V, Saint, 1215–96, pope (elected July 5, resigned Dec. 13, 1294), an Italian (b. Isernia) named Pietro del Murrone; successor of Nicholas IV. Celestine's election ended a two-year deadlock...

Constantine XI, Byzantine emperor

(Encyclopedia)Constantine XI (Constantine Palaeologus), d. 1453, last Byzantine emperor (1449–53), brother and successor of John VIII. To secure Western aid against the Turkish assault on what remained of the emp...