Pope Dioscorus I of Alexandria

Dioscorus I, twenty-fifth patriarch of Alexandria and successor of Cyril the Great, is venerated as a Coptic saint and commemorated on 7 Tut.[^1][^2]

Also known as: Dioscorus I · Dioscurus I · Saint Dioscorus · Dioscorus of Alexandria

Published 10/2/2026Updated 4 revisionsPage history

Patriarch of Alexandria

Dioscorus I was the twenty-fifth patriarch of the See of Saint Mark and succeeded Saint Cyril the Great in 444.1 His patriarchate is dated to 444–458, while differing dates are recorded for his death.16

Cyril chose Dioscorus as a close companion in religious meetings and made him an archdeacon.3 The Alexandrian presbytery elected him unanimously to succeed Cyril in 444.3

Relations with Rome and Chalcedon

On becoming patriarch, Dioscorus sent Possidonius to Rome with a message for Pope Leo I; Leo replied with an epistle affirming agreement between the two sees concerning sacramental discipline, priestly ordination, and liturgy.4

At the Council of Chalcedon in 451, Dioscorus faced accusations brought by Eusebius of Dorylaeum and supported by Theodoret of Cyrrhus.7 In his defense, he appealed to Athanasius, Gregory, and Cyril, maintaining that after the Incarnation there were not two natures but the incarnate nature of the Logos, and that he was defending their doctrine.7

Dioscorus was deposed and exiled to Gangra.5 Historical assessments differed sharply: he was regarded as a heretic in the West, whereas the Copts honored him as a prominent saint.5

Death and Commemoration

Dioscorus’s death is most commonly dated to 454, whereas another tradition places it in 458, also giving that year for the election of Timothy II.6 These dates are presented as differing source traditions rather than a settled chronology.6

Dioscorus was canonized by the Copts, and his name appears in the Coptic Synaxarion.6 His feast day is 7 Tut.2

Literary Tradition

An encomium on Macarius, bishop of Tkow, is traditionally ascribed to Dioscorus.8 Its authorship is identified as pseudonymous, and its composition is dated no earlier than the second quarter of the sixth century.9 The work draws on a pseudonymously attributed account of Dioscorus’s life and survives in Sahidic and Bohairic translations, with Arabic versions also extant.9

References

Sources

  1. 1.The Coptic Encyclopedia, Volume 3 — Aziz S. Atiya (Editor in Chief) (p. 603)
    DIOSCORUS I, saint and twenty-fifth patriarch of the See of Saint Mark (444-458). He succeeded Saint CYRIL THE GREAT
  2. 2.The Coptic Encyclopedia, Volume 7 — Aziz S. Atiya (Editor in Chief) (p. 123)
    DIOSCURUS I (feast day: 7 Tut), fifth-century patriarch of Alexandria.
  3. 3.The Coptic Encyclopedia, Volume 3 — Aziz S. Atiya (Editor in Chief) (p. 603)
    Owing to his devotion to the faith and to his sterling character in the defense of his high principles, he was chosen by Cyril I to be his close companion in his religious meetings. Cyril made him an archdeacon. ... It was on such occasions that the personality of Dioscorus became recognized within his own church and throughout the Byzantine empire, a fact that explains the ease and unanimity with which he was elected by the Alexandrian presbytery to succeed his mentor in 444.
  4. 4.The Coptic Encyclopedia, Volume 3 — Aziz S. Atiya (Editor in Chief) (p. 603)
    Dioscorus conveyed the news of his assumption to the throne of Saint Mark by dispatching to Rome a special messenger, Possidonius, with a brief addressed to Pope Leo, who answered by an epistle declaring the uniformity between the two sees in all matters of sacramental discipline, the ordination of the presbyters, and the handling of the liturgy.
  5. 5.The Coptic Encyclopedia, Volume 3 — Aziz S. Atiya (Editor in Chief) (p. 2)
    They could never forgive the Western delegation for the deposition of DIOSCORUS I (444-458) and for his being exiled to Gangra because of his firm stand against his adversaries on Coptic monophysitism. While Dioscorus was regarded in the West as a heretic, the Copts considered him one of their prominent saints and continued glorifying him until the beginning of the Crusades in the eleventh century.
  6. 6.The Coptic Encyclopedia, Volume 3 — Aziz S. Atiya (Editor in Chief) (p. 608)
    The date of the death of Dioscorus is stated in most sources as 454, that is, approximately four years after his exile. According to the HISTORY OF THE PATRIARCHS by Sawirus ibn al-Muqaffa‘, his death occurred in the year 458, which was also the year of the election of his successor TIMOTHY II (458-480). Dioscorus was canonized by the Copts, and his name appears in the SYNAXARION containing the names of saints and martyrs recognized by the Coptic church.
  7. 7.The Coptic Encyclopedia, Volume 3 — Aziz S. Atiya (Editor in Chief) (p. 606)
    Consequently, Marcian issued the formal invitation to the bishops of the East and the West for the Chalcedon meeting to be inaugurated on 8 October 451. ... After that, Eusebius of Dorylaeum declared his list of charges against Dioscorus, which were confirmed by Bishop Theodoret of Cyrrhus. In self-defense, Dioscorus reiterated that the reason for Flavian's condemnation was his assertion of the two natures after the Incarnation. Quotations were made from the Fathers Athanasius, Gregory, and Cyril, to the effect that after the Incarnation there were not two natures, but the incarnate nature of
  8. 8.The Coptic Encyclopedia, Volume 2 — Aziz S. Atiya (Editor in Chief) (p. 214)
    For example, an encomium on MACARIUS, BISHOP OF TKOW, is ascribed to Archbishop DIOSCORUS of Alexandria, twenty-fifth patriarch.
  9. 9.The Coptic Encyclopedia, Volume 5 — Aziz S. Atiya (Editor in Chief) (p. 346)
    The chief source for his life is the Panegyric on Macarius, Bishop of Tkow by Pseudo-Dioscorus of Alexandria. This work cannot have been composed earlier than the second quarter of the sixth century. It appears to be based on episodes dealing with Macarius drawn from the Life of Dioscorus by Pseudo-Theopistus of Alexandria, which the author of the Panegyric amplified and to which he added other traditional stories. Internal evidence indicates that the Panegyric was composed in Greek in or around Alexandria. It survives in Sahidic and Bohairic translations, and several unedited manuscripts of A

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This article was drafted from the sources listed above with AI assistance and reviewed by an editor before publication.