Consolidation of East Syriac Christianity in northern Mesopotamia By the end of the thirteenth century, although isolated East Syriac outposts persisted to the southeast of the
Great Zab, the districts of northern Mesopotamia included in the metropolitan provinces of
Mosul and
Nisibis were clearly regarded as the heartland of the Church of the East. When the monks Bar Sawma and Marcos (the future patriarch
Yahballaha III) arrived in Mesopotamia from China in the late 1270s, they visited several East Syriac monasteries and churches: They arrived in Baghdad, and from there they went to the great church of Kokhe, and to the monastery of Mar Mari the apostle, and received a blessing from the relics of that country. And from there they turned back and came to the country of Beth Garmaï, and they received blessings from the shrine of Mar Ezekiel, which was full of helps and healings. And from there they went to Erbil, and from there to Mosul. And they went to Shigar, and Nisibis and Mardin, and were blessed by the shrine containing the bones of Mar Awgin, the second Christ. And from there they went to
Gazarta d'Beth Zabdaï, and they were blessed by all the shrines and monasteries, and the religious houses, and the monks, and the fathers in their dioceses. With the exception of the patriarchal church of Kokhe in
Baghdad and the nearby monastery of Mar Mari, all these sites were well to the north of Baghdad, in the districts of northern Mesopotamia where historic East Syriac Christianity survived into the twentieth century. A similar pattern is evident several years later. Eleven bishops were present at the consecration of the Patriarch
Timothy II in 1318: the metropolitans Joseph of , of Nisibis and of Mosul, and the bishops of
Beth Garmaï, of Tirhan, of Balad, Yohannan of Beth Waziq, Yohannan of Shigar, of Hnitha, Isaac of Beth Daron and of Tella and Barbelli (Marga). Timothy himself had been metropolitan of
Erbil before his election as patriarch. Again, with the exception of (whose metropolitan, Joseph, was present in his capacity of 'designated successor' (
natar kursya) all the dioceses represented were in northern Mesopotamia.
Collapse of the exterior provinces The exterior provinces of the Church of the East, with the important exception of India, collapsed during the second half of the fourteenth century. Although little is known of the circumstances of the demise of the East Syriac dioceses in Central Asia (which may never have fully recovered from the destruction caused by the
Mongols a century earlier), it may have been due to a combination of persecution, disease, and isolation. The blame for the destruction of the East Syriac communities east of Iraq has often been thrown upon the Turco-Mongol leader
Timur, whose campaigns during the 1390s spread havoc throughout Persia and Central Asia. There is no reason to doubt that the destruction wrought by Timur fell indiscriminately upon Christians and Muslims alike, but in many parts of Central Asia, Christianity had died out decades before Timur's campaigns. The surviving evidence from Central Asia, including a large number of dated graves, indicates that the crisis for the East Syriac church occurred in the 1340s rather than the 1390s. Several contemporaries, including the papal envoy
John of Marignolli, mention the murder of the Latin bishop Richard and six of his companions in 1339 or 1340 by a Muslim mob in Almaliq, the chief city of Tangut, and the forcible conversion of the city's Christians to Islam. The last tombstones in two East Syriac cemeteries discovered in Mongolia around the end of the nineteenth century date from 1342, and several commemorate deaths during a plague in 1338. In China, the last references to East Syriac and Latin Christians date from the 1350s, and it is likely that all foreign Christians were expelled from China soon after the revolution of 1368, which replaced the
Mongol Yuan dynasty with the xenophobic
Ming dynasty. The collapse of East Syriac Christianity in Asia was probably so complete because it had always been the custom of the Church of the East to send out bishops from Mesopotamia to the dioceses of the 'exterior provinces'. In the chaos which followed the death of the Ilkhan Abu Sa'id (Ilkhanid dynasty)| in 1335, it may have been unable to send out fresh bishops to Central Asia, and without leaders of their own, the absorption of these communities by Islam was inevitable.
Campaigns of Timur, 1380–1405 It is possible that several East Syriac dioceses in Iraq were destroyed during the savage campaigns of Timur in western Asia between 1380 and 1405. The
West Syriac centre of
Tagrit in the irhan district was sacked by Timur, ending its importance as the residence of the local
Syriac Orthodox primates, titled as
maphrians, and the neighbouring East Syriac communities in Beth Garmaï and
Adiabene may have been treated in a similar fashion. In the absence of a better context, the disappearance of the traditional East Syriac dioceses of Beth Waziq,
Beth Daron,
Tirhan and
Daquqa, all of which had bishops earlier in the fourteenth century, may have been a result of Timur's campaigns. In , the metropolitan diocese of
Jundishapur (last mentioned in 1318) and the dioceses of
Susa and
Shushter (last mentioned towards the end of the thirteenth century) may also have come to an end at this period. By contrast, East Syriac Christianity continued to flourish in northern Mesopotamia. Although East Syriac communities disappeared from several villages in the Nisibis and Mosul districts in the fourteenth and fifteenth centuries, patterns of settlement seem generally to have persisted without radical disturbance. Although insufficient information has survived to be certain, there may well have been a continuous succession of bishops in the dioceses of Nisibis, Mosul and Erbil, and perhaps also in the dioceses of Hesna d'Kifa,
Gazarta,
Salmas and
Urmi. Timur's campaigns may have stimulated a migration of East Syriac Christians from the plains into the hills of the
Bohtan and
Hakkari districts, as a new diocese was created in the fifteenth century for Atel and Bohtan, and perhaps around the same time for Berwari. During the fourteenth and fifteenth centuries, there was also a metropolitan diocese for an East Syriac merchant community in
Cyprus. This community came under strong pressure from the
Latin Church, and the diocese lapsed after the metropolitan Timothy converted to Catholicism in 1445. By the middle of the sixteenth century, the East Syriac communities in India were all that survived of the Church of the East's exterior provinces (though the names of the old provinces of
Armenia, Arzun,
Jerusalem and China persisted or were later revived in the titles of the metropolitans of Nisibis, Hesna d'Kifa,
Amid and India respectively). In the west there were small East Syriac communities in Jerusalem,
Aleppo, and Cyprus, but without bishops. Small communities could still be found in the
Erbil,
Kirkuk and
Tabriz districts, but the main strength of the church was confined to northern Mesopotamia, in the districts which had earlier comprised the metropolitan provinces of Nisibis and Mosul. Although there was continuous East Syriac settlement in these districts between the thirteenth and sixteenth centuries the traditional dioceses of Beth Nuhadra, Beth Bgash, Marga (Tella and Barbelli), Hnitha and Salakh in the province of Mosul, and Balad and Tamanon in the province of Nisibis, ceased to exist at an unknown date during this period.
East Syriac mission to India, 1490–1503 Between 1490 and 1503, the Church of the East responded to the request of a mission to Mesopotamia from the East Syriac Christians of the
Malabar Coast of India for bishops to be sent out to them. In 1490, two Christians from Malabar arrived in
Gazarta to petition the Patriarch IV to consecrate a bishop for their church. Two monks of the monastery of Mar Awgin were consecrated bishops and were sent to India. IV died in 1497, to be followed by the short-reigned V, who died in 1502. His successor, Eliya V, consecrated three more bishops for India in April 1503. These bishops sent a report to the Patriarch from India in 1504, describing the condition of the East Syriac Church in India and reporting the recent arrival of the
Portuguese. Eliya had already died by the time this letter arrived in Mesopotamia, and it was received by his successor, VI (1504–1538). == East Syriac bishops, 1318–1552 ==