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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...

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...

Theodore II , Byzantine emperor of Nicaea

(Encyclopedia)Theodore II (Theodore Lascaris), 1222–58, Byzantine emperor of Nicaea (1254–58), son and successor of John III. He fought the Bulgarians and temporarily regained parts of Thrace. He made Nicaea a ...

Beyazid I

(Encyclopedia)Beyazid I bāyäzĭdˈ [key], 1347–1403, Ottoman sultan (1389–1402), son and successor of Murad I. He besieged Byzantine Emperor Manuel II at Constantinople, then overcame the Turkish rulers in E ...

Rulers of the Roman Empire (table)

(Encyclopedia)Rulers of the Roman Empire(including dates of reign) Emperors in the East(until the fall of Rome; see table entitled Rulers of the Byzantine Empireat Byzantine Empire for later emperors) Empero...

Charles I, king of Portugal

(Encyclopedia)Charles I, 1863–1908, king of Portugal (1889–1908), son and successor of Louis I. A cultured man, learned in language and oceanography, Charles had little opportunity to display his administrative...

Alexius III

(Encyclopedia)Alexius III (Alexius Angelus) ănˈjələs [key], d. after 1210, Byzantine emperor (1195–1203). He acceded to power by deposing and blinding his brother Isaac II. This act served as pretext for the ...

Manuel I, 1469–1521, king of Portugal

(Encyclopedia)Manuel I, 1469–1521, king of Portugal (1495–1521), successor of John II. Manuel's reign was most notable for the successful continuation of Portugal's overseas enterprises. John had planned the ex...

Martin I, Saint, d. 655?, pope

(Encyclopedia)Martin I, Saint, d. 655?, pope (649–55?), an Italian, b. Todi; successor of Theodore I. On his accession he summoned a great council at the Lateran, as St. Maximus had urged, to deal with Monothelet...

Theodore of Studium, Saint

(Encyclopedia)Theodore of Studium, Saint sto͞oˈdēəm [key], 759–826, Byzantine Greek monastic reformer, also called St. Theodore the Studite. As an abbot he was early exiled for opposing the marriage of Empero...