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From 1953 to the summer of 1954, Maricq conducted extensive field research in the Near East. His aimed to collect casts of all seal collections in the Near East, to obtain impressions of the ŠKZ, and to survey a site in Commagene that Ernest Honigmann identified as the convent of the Nestorian bishop Barṣauma.
By the late 3rd century the Syrian church was strongly established in the western Persian empire. The Nestorian church of Persia (“Church of the East”) conducted the most significant and enduring missionary work in Transoxania and beyond.