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Constantinople, Third Council of

(Encyclopedia)Constantinople, Third Council of, 680, regarded by Roman Catholic and Orthodox Eastern churches as the sixth ecumenical council. It was convoked by Byzantine Emperor Constantine IV to deal with Monoth...

Constantine I, king of Greece

(Encyclopedia)Constantine I, 1868–1923, king of the Hellenes, eldest son of George I, whom he succeeded in 1913. Married to Sophia, sister of the German emperor William II, he opposed the pro-Allied policy of the...

Gerontius

(Encyclopedia)Gerontius jərŏnˈshəs [key], d. 411, Roman general, b. Britain. He at first supported the usurper Constantine (d. 411), and was left in charge of Spain. He set up (409) his own candidate, Maximus, ...

Constantius II

(Encyclopedia)Constantius II, 317–61, Roman emperor, son of Constantine I. When the empire was divided (337) at the death of Constantine, Constantius II was given rule over Asia Minor, Syria, and Egypt, while his...

Sylvester I, Saint

(Encyclopedia)Sylvester I, Saint, pope (314–35), a Roman; successor of St. Miltiades (St. Melchiades). He was pope under the reign of Emperor Constantine I, who built for him the Lateran and other churches. St. S...

Byzantine art and architecture

(Encyclopedia)Byzantine art and architecture, works of art and structures works produced in the city of Byzantium after Constantine made it the capital of the Roman Empire (a.d. 330) and the work done under Byzanti...

Eusebius of Nicomedia

(Encyclopedia)Eusebius of Nicomedia nĭkōmēˈdēə [key], d. 342, Christian churchman and theologian, leader of the heresy of Arianism. He was bishop of Nicomedia (330–39) and patriarch of Constantinople (339�...

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...

Ducas

(Encyclopedia)Ducas dyo͞oˈkəs [key], Greek family and dynasty of Constantinople. Some of its members were Byzantine emperors—Constantine X, Michael VII, Alexius V, and John III. ...

Eudocia Macrembolitissa

(Encyclopedia)Eudocia Macrembolitissa măkˌrəmbŏlˌĭtĭsˈə [key], fl. 11th cent., Byzantine empress. At the death of her husband, Constantine X, she married Romanus IV. ...