Chaldean Catholic Archeparchy of Kirkuk-Sulaimaniya
The foundation of the Chaldean Catholic diocese of Kirkuk has been attributed to Yohannan VIII Hormizd, who was recognised by the Vatican as patriarchal administrator of the patriarch of Babylon in 1780 and, after five decades of disputes and confrontations, as patriarch in 1830. According to the Chaldean Catholic priest Joseph Tfinkdji, Yohannan Hormizd visited the town of Kirkuk in 1789 while travelling from Mosul to Baghdad, and converted its Church of the East community to Catholicism. He is said to have consecrated a Chaldean metropolitan for Kirkuk, Mar Abraham, who resided in Aïnqawa during his reign, and died between 1821 and 1824. The source for this assertion is not clear. Abraham is not mentioned by any other source, and as Yohannan Hormizd himself (then considered by the Vatican to be merely metropolitan of Mosul) is styled 'metropolitan of Kirkuk' in a colophon of 1798, the Kirkuk region would seem to have been part of the diocese of Mosul at this period.
Yohannan VIII Hormizd
Yohannan Hormizd was eventually ransomed by his supporters and returned to Mosul, where he had several of his opponents imprisoned. After a series of mutual recriminations, the Rabban Hormizd monks and the Catholic missionaries wrote jointly to the Propaganda calling for Yohannan's deposition, alleging that he was opposed to their order, that he incited the Kurds of Isma'il Pasha against them, and that he was endeavouring to lead the Chaldean proselytes back to Nestorianism. The Vatican was alarmed at these charges and on 15 February 1812 suspended Yohannan from his functions as archbishop of Mosul and patriarchal administrator and appointed Shemon Sayyegh apostolic vicar for Mosul and the priest Giwargis of Alqosh apostolic vicar for the patriarchate of Babylon. Both men were placed under the direct authority of Augustine Hindi, who was named "apostolic delegate for the affairs of the patriarchate of Babylon". While this decision temporarily placed the two Catholic patriarchates under a single trustworthy authority, it was from the Vatican's point of view little more than a makeshift, as Hindi could never command the same prestige in the Mosul district as a member of the old patriarchal family.