The Church of the East was an East Syriac Christian tradition that developed in Mesopotamia under Parthian and then Sasanian rule, east of the Roman Empire. It spread through merchants, monks and networks of bishops across Central Asia to China, while maritime connections linked its communities to India.
How did a church organized around Seleucia-Ctesiphon become established in the Tang capital, Chang’an? You can follow its connections through Sogdian inscriptions, Persian ports and a monument erected at Xi’an in 781. Those traces also explain why the familiar name “Nestorian” needs care.
How did the Church of the East develop within the Sasanian Empire?
The church grew within Mesopotamia under Parthian and then Sasanian government. Its early development took place east of the Roman Empire. That setting matters: its institutions developed within an empire whose Christian subjects could face accusations of loyalty to Rome.
Forced migration helped enlarge its communities. During Shapur I’s campaigns in the third century, Christian craftspeople were deported from Antioch and other Roman territories to Iran. These displaced Christians increased the Christian population within Sasanian lands.
Under Shapur II, persecution began in 339 and lasted about forty years. Christians in Iran were targeted amid accusations of allegiance to Rome. The relationship between Christian communities and the Sasanian ruler therefore formed part of the church’s institutional history.
The Synod of Seleucia-Ctesiphon in 410 opened with prayers for Yazdegerd I. It adopted the statement of faith of the Council of Nicaea of 325. Its arrangements listed six ecclesiastical provinces, including Ray and Abarshahr.
Catholicos Isaac was recognized in 410 as the Christian community’s leader and its representative before the Sasanian ruler. In 424, bishops meeting under Dadisho decided that church disputes should not be taken to outside religious authorities within the Roman Empire. This decision preceded the condemnation of Nestorius in 431.
Why is it called Nestorian and why is that label disputed?
The Council of Ephesus condemned Nestorius in 431. The Church of the East refused to condemn him, and its opponents consequently called it “Nestorian.” The label arose from that dispute. It does not describe the church’s earlier Mesopotamian development under Parthian and Sasanian rule.
The theological problem lies in what the label can imply. “Nestorian” has been used to attribute a teaching of two separate persons in Christ to the church. Baum and Winkler consider that description theologically incorrect. You should therefore distinguish the historical use of the name from the doctrine it appears to assign.
The church’s own writers also challenged the name. In his Book of the Pearl of 1298, Abdisho bar Brika rejected it and pointed out that Nestorius had not been their patriarch. His objection shows that resistance to the label existed within the tradition itself.
How does the East Syriac tradition differ from Syriac Orthodox and Eastern Orthodox churches?
The Church of the East belongs to the East Syriac tradition. The Syriac Orthodox Church belongs to the West Syriac tradition. These are distinct liturgical and ecclesiastical traditions, despite the shared word “Syriac” in their names.
Their theological histories also differ. The Syriac Orthodox tradition is Miaphysite. Eastern Orthodoxy, with its Byzantine origins, accepts the Council of Chalcedon of 451. The Church of the East developed a separate Christological tradition.
In the seventh century, Babai the Great taught that Christ’s two qnoma were united in one parsopa. These Syriac terms do not correspond exactly to Greek theological concepts. Translating them as though they were direct equivalents can obscure the teaching being described.
A later agreement helps explain the disputed terminology. On 11 November 1994, John Paul II and Mar Dinkha IV signed a common declaration affirming the union of Christ’s divinity and humanity in one person. It provides a concrete point of reference alongside the older disputes.
How did it reach India, Central Asia and China through Silk Road networks?
The church’s expansion involved both overland and maritime connections. Sogdian Christian trading journeys are documented by crosses accompanied by Sogdian inscriptions on the rocks at Drangtse in Ladakh. These marks connect Christian presence with people travelling through Asian trading networks.
Church leadership supported eastward missions. During his patriarchate from 780 to 823, Timothy I sent missionaries east and consecrated metropolitans for the Turks and Tibet. Expansion thus involved appointments by church authorities as well as the journeys of individual Christians.
The Indian connections followed sea routes. Members of the Church of the East participated in maritime trade linking Iranian ports with India and Sri Lanka. They benefited from transport networks connecting churches across those waters.
Think of an everyday parcel travelling through connected delivery points. For this church, ports and ecclesiastical centres helped connect distant communities. The metropolitan of Rēw Ardašīr, a port in Fars, was responsible for consecrating bishops for Christians in India. You can see that the maritime link carried church authority as well as travellers.
The account of arrival in China survives on the Xi’an monument. According to its narrative, the Persian bishop Alopen reached Chang’an, the Tang capital, in 635 and was received at the imperial court. The monument recording this arrival was erected in 781.
Emperor Taizong ordered a monastery to be built for Alopen and his monks in 638. He also ordered the circulation of the sacred texts they had brought. According to the monument, those Christian texts were translated in the imperial library and examined by Taizong.
The Xi’an monument combines a Chinese text with Syriac writing. Erected in 781, it commemorated approximately 150 years of East Syriac presence in the Tang capital. Its languages preserve the connection between the church’s Syriac tradition and its Chinese setting.
Details you won’t find in guidebooks
A cross in a Syriac church at Kottayam in Kerala carries a Pahlavi inscription. It preserves a material connection with Iran. Alongside the responsibility of Rēw Ardašīr for Indian bishops, it gives the maritime relationship a tangible form.
At Afrasiyab, near Samarkand, two ossuaries decorated with crosses suggest that some Sogdian Christians continued the burial practices of their Zoroastrian neighbours. These objects point to Christian affiliation existing alongside inherited local customs.
On Kharg Island in the Persian Gulf, a monastery arranged around a church contained about sixty monks’ cells. Each cell consisted of three small rooms. The remains offer a concrete glimpse of the spaces occupied by a monastic community.
A fragmented Christian manuscript library was discovered near Bulayïq in 1905. The German Turfan expedition led by Albert von Le Coq found it about ten kilometres north of Turfan. Its texts included Syriac, Sogdian, Turkish and Persian.
One Bulayïq fragment contains the beginning of a Greek psalm written over its Sogdian translation. If you picture the church only through its Syriac name, this manuscript evidence adds several languages to the picture. The surviving collection records a multilingual Christian setting.
Which communities continued its historical legacy?
Excavated churches at Hira, dated to the seventh or possibly sixth century, continued in use after the Muslim conquest. Their continued use is one example of Christian institutions surviving a change in political rule.
The Church of the East experienced another period of expansion within the Mongol Empire during the thirteenth and fourteenth centuries. In the fourteenth century, fragmentation of the Mongol world and Islamization accompanied the decline of its Central Asian communities.
Its East Syriac heritage continues in the Assyrian Church of the East and the Ancient Church of the East. It also continues in the Catholic Chaldean and Syro-Malabar churches. These communities preserve the historical legacy of a tradition whose connections extended from Mesopotamia to India and China.
Timeline
- Third century: Christian deportees from Roman territories enlarged Sasanian communities.
- 339: Major persecution began under Shapur II and lasted about forty years.
- 410: The Synod of Seleucia-Ctesiphon organized church institutions and adopted the Nicene faith.
- 424: Bishops under Dadisho rejected appeals to outside religious authorities within the Roman Empire.
- 431: The Council of Ephesus condemned Nestorius.
- 635: According to the Xi’an monument, Alopen reached Chang’an.
- 638: Taizong ordered a monastery for Alopen’s community.
- 780–823: Timothy I supported eastward missions.
- 781: The Xi’an monument was erected with Chinese and Syriac writing.
- Thirteenth–fourteenth centuries: Expansion under Mongol rule was followed by decline in Central Asia.
- 1905: The manuscript library near Bulayïq was discovered.
- 11 November 1994: John Paul II and Mar Dinkha IV signed their common Christological declaration.
FAQ
What was the Church of the East?
It was an East Syriac Christian tradition that developed in Mesopotamia under Parthian and then Sasanian rule, east of the Roman Empire.
Why is the name Nestorian disputed?
Opponents applied the name after the church refused to condemn Nestorius. Baum and Winkler reject the label’s implication that the church taught two separate persons in Christ.
When did the Church of the East reach China?
According to the Xi’an monument erected in 781, the Persian bishop Alopen reached the Tang capital, Chang’an, in 635.
Which churches preserve its heritage?
The East Syriac heritage continues in the Assyrian Church of the East, the Ancient Church of the East, the Chaldean Catholic Church and the Syro-Malabar Church.
Sources
- Wilhelm Baum and Dietmar W. Winkler — The Church of the East api.pageplace.de
- Encyclopaedia Iranica — Christianity i iranicaonline.org
- English Wikipedia — Church of the East en.wikipedia.org
- Encyclopaedia Iranica — Christianity iii iranicaonline.org
- Austrian Academy of Sciences publication — The Mission of the Church of the East to South India austriaca.at
- Encyclopaedia Iranica — Christianity viii iranicaonline.org
- Brett Knowles — Alopen, The Encyclopedia of Christian Civilization onlinelibrary.wiley.com
- Encyclopaedia Iranica — Bulayïq iranicaonline.org
- Encyclopaedia Iranica — Christianity ii iranicaonline.org
- Vatican — Common Christological Declaration vatican.va
Image: Church of St George – Kyustendil.jpg — Plamen Agov (user:MrPanyGoff), CC BY-SA 3.0
