St. ... // Events The Sassanid dynasty of Persia launches a war to reconquer lost lands in the Roman east. ... Dioscorus (or Dioscurus) (died c. ... The Patriarch of Alexandria is the bishop of Alexandria, Egypt. ... Events Pope Leo I extinguishes the Gallican vicariate Armagh founded by St. ... Events April 7 - The Huns sack Metz June 20 - Attila, king of the Huns is defeated at Troyes by Aetius in the Battle of Chalons. ... Discorus, Antipope from 22 September 530 – 14 October 530. ... Events September 22 - Pope Boniface II is elected to succeed Pope Felix IV December 15 - Justinian selects a second commission to excerpt and codify the writings of the jurists on Roman Law. ... Justinian I depicted on a Byzantine mosaic Flavius Petrus Sabbatius Iustinianus or Justinian I (May 11, 483âNovember 13/14, 565), was Eastern Roman Emperor from AD August 1, 527 until his death. ... Map of Constantinople. ... Antipope Felix V, the last historical Antipope. ... The Patriarch of Alexandria is the bishop of Alexandria, Egypt. ... Events Council of Tarragona Sigismund becomes king of Burgundy. ... Events John of Cappadocia becomes Patriarch of Constantinople. ... The Byzantine Empire is the term conventionally used to describe the Roman Empire during the Middle Ages, centered at its capital in Constantinople. ... Events Beginning of the Western Wei Dynasty in China. ...
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Dioscorus presided, and next to him Julian and Hilarius, the papal legates, then Juvenal of Jerusalem, Domnus II of Antioch, and – his lowered position indicating what was to come – Flavian of Constantinople.
Dioscorus proposed that the doctrinal decisions of the Council of Ephesus of 431, in its first and sixth sessions, with those of Nicaea, should be recognized as an unalterable standard of orthodoxy; that whoever should say or think otherwise, should be put under censure.
First was the fall of his patron Chrysaphius in the summer of 450; next was the death of Theodosius II, and the marriage of the orthodox Pulcheria, sister of Theodosius, to Marcian, enabling her to push for the new council that met at Chalcedon on October 8, 451.