Dioscorus of Alexandria

Bishop of Alexandria, deposed in 451Also: Dioscorus I, Dioscoros

Successor of Cyril as bishop of Alexandria. He presided at the council of Ephesus in 449 and was deposed at Chalcedon in 451. Those who rejected Chalcedon honoured him as a confessor of the faith of Cyril.

Dioscorus followed Cyril as bishop of Alexandria and presided over the council of Ephesus in 449, which restored Eutyches and deposed Flavian of Constantinople (Evagrius, Ecclesiastical History 1.10). At the Council of Chalcedon he was made to sit as an accused. He told the council that he accepted the phrase “of two” natures but not “two” (Council of Chalcedon session 1). He refused three summonses to a later session and was deposed, in the words of the sentence, for disregarding the canons, for disobedience to the council and for other offences (Council of Chalcedon session 3, sentence on Dioscorus). He was exiled to Gangra in Paphlagonia (Evagrius, Ecclesiastical History 2.5).

The two sides remembered him differently. The council’s supporters held him responsible for the death of Flavian after the council of 449 (Evagrius, Ecclesiastical History 2.2). Zachariah, who wrote from the other side, says that his faith was that of Athanasius and Cyril, that Anatolius of Constantinople himself admitted he was not deposed for the faith, that he went into exile as a confessor, and that the clergy and monks of Egypt who would not accept his successor went on proclaiming his name (Zachariah, Chronicle 3.1–2).

In the timeline

  1. August AD 449, firm date
    The Second Council of Ephesus

    A council under Dioscorus of Alexandria restores the monk Eutyches and deposes Flavian of Constantinople and other bishops as followers of Nestorius. The emperor confirms it; Leo of Rome rejects it as a meeting of robbers. Chalcedon overturns it two years later.

  2. October AD 451, firm date
    The Council of Chalcedon

    A council called by the emperor Marcian confesses Christ as one person in two natures, divine and human, and ranks Constantinople next after Rome. The Greek and Latin churches receive it; the Coptic, Syriac Orthodox, Armenian and Ethiopian churches do not.

Primary sources

Ecclesiastical History

Evagrius Scholasticus · c. AD 593–594 · Greek

The Syriac Chronicle Known as That of Zachariah of Mitylene

Zachariah the Rhetor, in an anonymous Syriac compilation · Greek original between AD 491 and 518; Syriac compilation completed AD 569 · Syriac, from a lost Greek original

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