Ioannes VIII (other)
Ioannes VIII ( el, , ''Iōannēs Ē''') may refer to: * Patriarch John VIII of Constantinople (r. 1064–1065) * John VIII Palaiologos, Byzantine Emperor (1392–1448) See also * John VIII (other) John VIII may refer to: * Pope John VIII, Pope from 872 to 882 * Antipope John VIII, antipope in 844 * John VIII bar Abdoun, Syriac Orthodox Patriarch of Antioch (944-1033) * John VIII of Constantinople, Patriarch of Constantinople (1010-1075) * ...

Patriarch John VIII Of Constantinople
John VIII Xiphilinos ( el, Ἰωάννης Ηʹ Ξιφιλῖνος; c. 1010 – 2 August 1075), a native of Trebizond, was a Byzantine intellectual, jurist, and patriarch of Constantinople from 1064 to 1075. He was the uncle of John Xiphilinus, the Epimator. He is considered "an innovator in the field of the methodology of jurisprudential research." Early career John Xiphilinos was born in Trebizond. He pursued studies at the University of Constantinople and eventually became ''nomophylax'' of its School of Law. Later he became a monk and was eventually selected by Emperor Constantine X Doukas (1059–67) to succeed Constantine Leichoudes as the patriarch of Constantinople. Episcopacy In 1072 John VIII presided over an assembly of metropolitans and archbishops at the oratory of Saint Alexius in which the question of the election of bishops to vacant sees was discussed. Michael Keroularios had forbidden metropolitans who were resident in Constantinople from participating i ...
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John VIII Palaiologos
John VIII Palaiologos or Palaeologus ( gr, Ἰωάννης Παλαιολόγος, Iōánnēs Palaiológos; 18 December 1392 – 31 October 1448) was the penultimate Byzantine emperor, ruling from 1425 to 1448. Biography John VIII was the eldest son of Manuel II Palaiologos and Helena Dragaš, the daughter of the Serbian prince Constantine Dragaš. He was associated as co-emperor with his father before 1416 and became sole emperor on 1 July 1425, although he had already assumed full power on 19 January 1421. In June 1422, John VIII Palaiologos supervised the defense of Constantinople during a siege by Murad II, but had to accept the loss of Thessalonica, which his brother Andronikos had given to Venice in 1423. To secure protection against the Ottomans, he made two journeys to Italy in 1423 and 1439. In 1423, he became the last Byzantine emperor (the first since emperor Constans II' visit in 663) to make a visit to Rome. During the second journey he visited Pope ...
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