There is no evidence for an East Syrian bishop or metropolitan of Seert before the schism of 1551. From just before the end of the fifteenth century Seert seems to have been under the jurisdiction of the metropolitan Eliya of Nisibis, who was styled 'metropolitan of Nisibis, Mardin, Amid, Hesna d'Kifa and Seert' in a colophon of 1477; 'metropolitan of Nisibis, Armenia, Amid, Hesna d'Kifa and Seert' in 1480; and 'metropolitan of Nisibis, Armenia, Mardin, Amid, Seert and Hesna d'Kifa' in 1483. In 1504 another Eliya, perhaps the same man, was styled 'metropolitan of Amid, Gazarta and Seert' in the colophon of a manuscript copied in the monastery of Mar . According to Tfinkdji, followed by
Fiey, the first bishop or metropolitan of Seert was
Joseph, brother of the patriarch
Yohannan Sulaqa, who would have been among the bishops consecrated by Sulaqa in 1554. The source for this assertion is not clear, and it is possible that Joseph was instead metropolitan of Gazarta, where a metropolitan of that name is attested between 1555 and 1568. In any case, Joseph Sulaqa did not remain long in his office. In 1555 he was sent to India with Eliya Asmar by the patriarch IV and was there consecrated metropolitan of India. He did not return to Mesopotamia, and after struggling for several years to maintain his authority in the face of harassment by the Portuguese authorities, he died in 1569 in or on his way to Rome. Although there are no references to a bishop of Seert in manuscript colophons from the second half of the sixteenth century, the monastery of Mar in the Seert district was the seat of the patriarch and his successor , and a number of manuscripts were copied there by himself and by the Catholic metropolitans Eliya Asmar of Amid and of Mardin. The district would therefore have come under strong Catholic influence at this period, and it is not surprising to find Seert listed by IV in 1562 as a metropolitan see under his jurisdiction, with a suffragan bishop at 'Azzen', possibly Hesna d'Kifa. According to Peter Strozza, the Catholic patriarch (1580–1600) was archbishop of Jilu and Seert before his election, and therefore might have been consecrated by IV. His letter of 1580 written to pope Gregory XIII shortly after his election was witnessed, among others, by the bishops Sargis of Jilu and Joseph of Seert, both probably consecrated by the new patriarch. The witnesses of
Eliya VI's profession of faith in 1586 did not include a metropolitan of Seert, but a metropolitan of Seert named Mar , 'superior of the monastery of Seert', is mentioned by Leonard Abel in 1587 as among 'the more lettered men of the Nestorian nation'. The metropolitan Eliya Bar Tappe, dependent on the patriarch
Eliya VII (1591-1617), is mentioned under a variety of titles in the dating formulas or colophons of several manuscripts between 1599 and 1618. He resided at the monastery of Mar throughout his reign, and was primarily responsible for the diocese of Seert, though he clearly had responsibilities for Amid, Gazarta and Hezzo also, and was regarded as their metropolitan for at least part of his reign. He is mentioned as metropolitan of Amid in the report of 1607, and was among the recipients of a letter of Peter Strozza in 1614. He was present at the synod of Amid in 1616 with the metropolitans of Amid and Gazarta, and was on that occasion styled simply metropolitan of Seert. The dating formula of a manuscript copied in the monastery of Mar in 1612 mentions the patriarch
Eliya VII and 'the metropolitans Mar Eliya and Mar Gabriel'. Mar Gabriel is probably to be identified with the metropolitan Gabriel of Hesna d'Kifa, attested between 1607 and 1617, and there is no need to suppose that Seert had two metropolitans at this period. Eliya Bar Tappe died on 1 March 1618, the third Sunday of Lent, and was buried in the monastery of Mar the Recluse near Seert. He was succeeded as metropolitan by his nephew , who built the sanctuary door of the monastery of Mar in 1619. 's jurisdiction also seems to have been wider than Seert itself, and he is mentioned under a variety of titles in the dating formulas of manuscripts copied between 1618 and 1628. A metropolitan named Eliya, 'nephew of Mar ', died on the Friday of Saint John the Baptist, 1660. A metropolitan of Seert named Yohannan was one of the signatories of a letter of 22 November 1669 from the Patriarch
Eliya IX (1660-1700) to pope Clement IX. He was probably succeeded by the metropolitan , attested in September 1702, when a manuscript was copied for the bishop 'Mar , of the Tappe family, living in the monastery of Mar '. Tfinkdji, followed by Fiey, confused him with his Catholic namesake (see below), and placed his death in 1742. He was probably a Nestorian bishop dependent on the Eliya line, and is not mentioned again, unless he is the unnamed 'heretic bishop' who recovered two villages of Seert from in 1738. == The Chaldean bishops of Seert ==