East-Syriac Rite in the context of "Iran–Iraq border"

The Syriac language (/ˈsɪriæk/ SIRR-ee-ak; Classical Syriac: ܠܫܢܐ ܣܘܪܝܝܐ, romanized: Leššānā Suryāyā), also known natively in its spoken form in early Syriac literature as Edessan (Urhāyā), the Mesopotamian language (Nahrāyā) and Aramaic (Aramāyā), is an Eastern Middle Aramaic dialect. Classical Syriac is the academic term used to refer to the dialect's literary usage and standardization, distinguishing it from other Aramaic dialects also known as 'Syriac' or 'Syrian'. In its West-Syriac tradition, Classical Syriac is often known as leššōnō kṯoḇonōyō (lit. 'the written language or the book language') or simply kṯoḇonōyō, or kṯowonōyō, while in its East-Syriac tradition, it is known as leššānā ʔatīqā (lit. 'the old language') or saprāyā (lit. 'scribal or literary').

It emerged during the first century AD from a local Eastern Aramaic dialect that was spoken in the ancient region of Osroene, centered in the city of Edessa. During the Early Christian period, it became the main literary language of various Aramaic-speaking Christian communities in the historical region of Ancient Syria and throughout the Near East. As a liturgical language of Syriac Christianity, it gained a prominent role among Eastern Christian communities that used both Eastern Syriac and Western Syriac rites. Following the spread of Syriac Christianity, it also became a liturgical language of eastern Christian communities as far as India and China. It flourished from the 4th to the 8th century, and continued to have an important role during the next centuries, but by the end of the Middle Ages it was gradually reduced to liturgical use, since the role of vernacular language among its native speakers was overtaken by several emerging Neo-Aramaic languages.