The geographic location of the patriarchate was first in
Edessa and then transferred to the Persian capital of
Seleucia-Ctesiphon in central Mesopotamia during the Roman conquest of Edessa. In the 9th century the patriarchate moved to
Baghdad and then through various cities in what was then
Assyria (
Assur/
Athura) and is now northern
Iraq, south east
Turkey and northwest
Iran, including,
Tabriz,
Mosul, and
Maragheh on
Lake Urmia. Following the Chaldean Catholic Church split from the Assyrian Church, the respective patriarchs of these churches continued to move around northern Iraq. In the 19th century, the patriarchate of the Assyrian Church of the East was in the village of
Qudshanis in southeastern
Turkey. In the 20th century, the Assyrian patriarch went into exile, relocating to
Chicago,
Illinois, United States. Another patriarchate, which split off in the 1960s as the
Ancient Church of the East, is in Baghdad. The patriarchate of the Church of the East evolved from the position of the leader of the Christian community in
Seleucia-Ctesiphon, the Persian capital. While Christianity had been introduced into
Assyria then largely under the rule of the
Parthian Empire in the first centuries AD, during the earliest period, leadership was unorganized and there was no established succession. In 280,
Papa bar Aggai was consecrated as Bishop of Seleucia-Ctesiphon by two visiting bishops, Akha d'abuh' of
Arbela and Hai-Beël of
Susa, thereby establishing the generally recognized succession. Seleucia-Ctesiphon thus became its own
episcopal see, and exerted some
de facto control over the wider Persian Christian community. Papa's successors began to use the title of
Catholicos, a Roman designation probably adopted due to its use by the
Catholicos of Armenia, though at first it carried no formal recognition. In 409 the Church of the East received state recognition from the
Sassanid Emperor Yazdegerd I, and the
Council of Seleucia-Ctesiphon was called, at which the church's hierarchy was formalized. Bishop
Mar Isaac was the first to be officially styled Catholicos over all of the Christians in Persia. Over the next decades, the Catholicoi adopted the additional title of
Patriarch, which eventually became the better known designation. The conventional
list of patriarchs of the Church of the East includes around 130 patriarchs. A number of these patriarchs are legendary, or have been included in the standard lists on dubious evidence according to some historians like
Jean Maurice Fiey. According to him, the Church of the East, although separated from the
State church of the Roman Empire, was not immune to its fashions. One such fashion was to fill in the inevitable gaps in the historical record to trace a succession of bishops in individual dioceses right back to the 1st century, preferably to an apostolic founder. This fashion found particular favour in the case of the diocese of Seleucia-Ctesiphon. The first bishop of Seleucia-Ctesiphon for whom incontestable evidence exists was Papa, who was consecrated around 280. During the 6th century ingenious attempts were made to link Papa with
Mari, the legendary apostle of Babylonia. The author of the 6th-century
Acts of Mari simply ignored the gap of two and a half centuries that separated the two men and declared that Mari had founded the diocese of Seleucia-Ctesiphon shortly before his death and consecrated Papa as his successor. According to Fiey, later writers were more cunning with their inventions.
Shahlufa and
Ahadabui, two late-3rd-century bishops of Erbil who had played a notable part in the affairs of the church of Seleucia-Ctesiphon, were 'converted' retrospectively into early patriarchs. Ahadabui was said to have governed the church of Seleucia-Ctesiphon from 204 to 220, and Shahlufa from 220 to 224. However the
Chronicle of Seert, names Shahloopa (Shahlufa) as a Patriarch of the Church of the East. Fiey also claims that, for the 2nd century, three patriarchs were frankly invented:
Abris (121–37),
Abraham (159–71) and
Yaqob (190). All three men were declared to be relatives of Joseph, the earthly father of Jesus, and given plausible backstories. Fiey also claims these five phantom 'patriarchs' were included in all the later histories of the Church of the East, and by the 12th century their existence was an article of faith for the historian Mari bin Sulaiman. According to Feiy, they are still included by courtesy in the traditional
list of patriarchs of the Church of the East, even though most scholars agree that they never existed. However, not all historians and ecclesiastical scholars regard Fiey's opinion to be correct. == Patriarchal succession, 1318–1552 ==