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Otto III, Holy Roman emperor

(Encyclopedia)Otto III, 980–1002, Holy Roman emperor (996–1002) and German king (983–1002), son of Holy Roman Emperor Otto II and the Byzantine princess Theophano. On Otto's accession Henry the Wrangler, the ...

Peter III, czar of Russia

(Encyclopedia)Peter III, 1728–62, czar of Russia (1762), son of Charles Frederick, dispossessed duke of Holstein-Gottorp, and of Anna Petrovna, daughter of Peter the Great. He succeeded to the throne on the death...

Peter III, king of Portugal

(Encyclopedia)Peter III, 1717–86, king of Portugal (1777–86), younger brother of Joseph. He married his niece Maria I and was joint ruler with her, though she generally was the dominant figure. ...

Constans I

(Encyclopedia)Constans I kŏnˈstănz [key], b. 320 or 323, d. 350, Roman emperor, youngest son of Constantine I. At his father's death in 337 he received Italy and Africa as well as Pannonia and Dacia, while his b...

Lucifer of Cagliari

(Encyclopedia)Lucifer of Cagliari kälyäˈrē [key], d. 370, bishop of Cagliari, Sardinia (353–70), violent opponent of Arianism. As legate of Pope Liberius he went to the council at Milan (355) that Constantius...

Maxentius

(Encyclopedia)Maxentius (Marcus Aurelius Valerius Maxentius) măksĕnˈshəs [key], d. 312, Roman emperor (306–12), son of Maximian. After Diocletian and Maximian had retired, the successor to Maximian, Constanti...

Alfonso III, Spanish king of Asturias

(Encyclopedia)Alfonso III (Alfonso the Great), 838?–911?, Spanish king of Asturias (866–911?). He recovered the territory of León from the Moors. The kingdom was consolidated in his reign, but after his forced...

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...

Leopold III, king of the Belgians

(Encyclopedia)Leopold III, 1901–83, king of the Belgians (1934–51), son and successor of Albert I. In 1936, Leopold announced a fundamental change in foreign policy; Belgium abandoned its military alliance with...

William III, king of the Netherlands

(Encyclopedia)William III, 1817–90, king of the Netherlands and grand duke of Luxembourg (1849–90), son and successor of William II. William III ruled as a constitutional monarch, and his long reign was unmarre...