Qasr Serīj lies five kilometres south-west of Tell Hugna, and some sixty kilometres north-west of Mosul, on gently undulating ground at the southern foot of Jebel Qusair. It is watered by a small perennial stream, now used to irrigate the fields of the modern village of Qusair just to the north of the ancient site. The ruins were visited by the writer in 1956 in the course of a survey sponsored by the Stein-Arnold Fund of the British Academy, and will be more fully published in the forthcoming account of that work. I am greatly indebted to Father John Fiey, of the Dominican community in Mosul, who subsequently called my attention to documentary evidence for the foundation of a monastery, and a church dedicated to St. Sergius, in this region by Mar Ahudemmeh, Metropolitan of the monophysite church in Mesopotamia A.D. 559–575, and suggested that this church was Qasr Serīj, an identification which is amply confirmed by the evidence. The purpose of this brief article is to entertain readers of Iraq with an unusually well-documented episode in a little known period of Mesopotamian history, the last century of Sassanian rule before the coming of Islam.
The church stands in the middle of a ruin field extending half a kilometre to the east of the watercourse. The other buildings, although some at least may be contemporary, were apparently built of mortared rubble in the common medieval tradition of the region, and are so far buried in their own debris that no coherent plan can be recovered. The church, on the other hand, was constructed of carefully dressed limestone blocks, and parts of the structure stand to nearly their original height. The plan (Plate XXVII), which is unique among the existing monuments of Iraq, is that of a small basilica of North Syrian type, of which many well-preserved examples exist farther to the west. It is an approximate rectangle c. 23 by 14 m., with a central nave flanked by aisles and terminating in an inscribed semi-circular apse.