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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...

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...

Frederick III, elector of Saxony

(Encyclopedia)Frederick III or Frederick the Wise, 1463–1525, elector of Saxony (1486–1525). At Wittenberg he founded (1502) the university where Martin Luther and Melanchthon taught. At a crucial period for th...

Augustus III

(Encyclopedia)Augustus III, 1696–1763, king of Poland (1735–63) and, as Frederick Augustus II, elector of Saxony (1733–63); son of Augustus II, whom he succeeded in Saxony. Elected king of Poland by a minorit...

Philip, Roman emperor

(Encyclopedia)Philip or Philip the Arabian (Marcus Julius Philippus), 204?–249, Roman emperor (244–49). He served under Gordian III against the Persians, instigated the assassination of the emperor, and conclud...

Leo III, Byzantine emperor

(Encyclopedia)Leo III (Leo the Isaurian or Leo the Syrian), c.680–741, Byzantine emperor (717–41). He was probably born in N Syria (rather than in Isauria, as once thought). He held diplomatic and military post...

Innocent III

(Encyclopedia)Innocent III, b. 1160 or 1161, d. 1216, pope (1198–1216), an Italian, b. Anagni, named Lotario di Segni; successor of Celestine III. Innocent III was succeeded by Honorius III. Amid all his politi...

Frederick William I

(Encyclopedia)Frederick William I, 1688–1740, king of Prussia (1713–40), son and successor of Frederick I. He continued the administrative reforms and the process of centralization begun by Frederick William, t...