This article examines the Tangchaodun bema—a liturgical structure dating to the Gaochang Uyghur Kingdom in Xinjiang—as a regional manifestation of the architectural and theological tradition of the Church of the East, shaped over centuries of transmission and adaptation. Through comparative analysis of archaeological remains and liturgical texts from Syria, Mesopotamia, and Central Asia, the study argues that the Tangchaodun bema follows the ‘eastern-type bema’ model rooted in the East Syrian tradition. Its spatial configuration and ritual function reflect established Mesopotamian patterns, particularly in the mirroring of bema and sanctuary, while also incorporating localised features shaped by visual adaptation and intercultural contact. Bilingual inscriptions and iconographic traces further attest to this integration of tradition and regional context.

Rather than existing in isolation, the Tangchaodun bema forms part of a broader historical development in East Syriac ecclesiastical architecture. By positioning the site within this extended line of transmission, the article shows how sacred space operated as a medium of both theological continuity and cultural dialogue across Asia. In so doing, it offers new perspectives on the role of Christian architecture in the Tang to Yuan Dynasties and contributes to a more integrated understanding of the Church of the East in its easternmost reaches.