Bible & Christianity › Early church & the councils › Council of Chalcedon: Christ fully God and fully human
Oriental Orthodox churches (Coptic, Armenian, Ethiopian, Syriac)
split after Chalcedon, 451; Armenia Christian from c. 301· Church or tradition· Church, doctrine & the world
Historical recordConfirmed by archaeology, outside sources or contemporary records.
A family of ancient churches, including Coptic, Armenian, Ethiopian and Syriac, that rejected the Council of Chalcedon in 451.
See it on the Bible & Christianity map →What it is
Six churches belong: Coptic (Egypt), Ethiopian, Eritrean, Armenian Apostolic, Syriac Orthodox and Malankara (India). They follow Cyril of Alexandria's formula of 'one incarnate nature' of Christ and call themselves 'miaphysite', rejecting the older label 'monophysite'. Armenia is traditionally the first Christian kingdom, about 301, under King Tiridates III and Gregory the Illuminator. Ethiopia's King Ezana converted around 330. They share communion with each other, not with Rome or Constantinople.
Why it matters
They preserve some of Christianity's oldest liturgies and languages (Coptic, Ge'ez, Armenian, Syriac), often surviving for centuries as minorities under Muslim rule.
Sources and history
King Ezana's coins switch from pagan symbols to the cross around 330–340. Mesrop Mashtots created the Armenian alphabet around 405 to translate the Bible. Members today: roughly 60 million (estimates vary).
Questions and debates
The date of Armenia's conversion (301 or about 314) is debated, as is how far the Chalcedon split was theology versus local resentment of Constantinople.
Connections (2)
▸Oriental Orthodox churches (Coptic, Armenian, Ethiopian, Syriac) rejected the definition of Council of Chalcedon: Christ fully God and fully humanHistorical record
The connection
Many Christians in Egypt, Syria and Armenia held to Cyril of Alexandria's phrase 'one incarnate nature of God the Word'. To them, Chalcedon's 'in two natures' leaned toward Nestorius, and its removal of Alexandria's bishop Dioscorus felt like an insult. Imperial attempts at compromise, like the Henotikon (482), failed, and separate churches formed.
When and where
Chalcedon (451), then Alexandria and Antioch in the following decades; Armenian councils at Dvin (506 and 554) formally rejected Chalcedon.
Historical evidence
Writings of the leading anti-Chalcedonian theologian, Severus of Antioch (died 538), and later church chronicles document the split.
Questions and debates
Modern dialogues, including Pope Paul VI with Coptic Pope Shenouda III (1973), found both sides hold the same faith in different words; full communion is not restored.
▸Rise of Islam and the Arab conquests brought under Muslim rule Oriental Orthodox churches (Coptic, Armenian, Ethiopian, Syriac)Historical record
The connection
Arab armies took Syria (634–640), Egypt (639–642) and Armenia (from the 640s). Coptic and Syriac Christians, often pressured by Byzantium as non-Chalcedonians, became dhimmis: they kept their churches and paid the jizya tax, but faced restrictions. Over centuries they became minorities, and Arabic largely replaced Coptic and Syriac in daily life. Ethiopia stayed independent.
When and where
Egypt under the general Amr ibn al-As (639–642), Syria and Mesopotamia (630s–640s), and Armenia from the 640s.
Historical evidence
Coptic sources such as John of Nikiu's chronicle (late 7th century) and the History of the Patriarchs, and Syriac chronicles such as Michael the Syrian's (12th century).
Questions and debates
Whether Copts welcomed the Arabs, as an older story says, is debated, as is when Egypt became majority Muslim: estimates range from the 9th to the 14th century.