The Role of Nisibis on Rome’s Eastern Border: An Archaeological and Historical Assessment

Abstract

This study examines the role of Nisibis (modern Nusaybin) within the eastern frontier system of the Roman Empire through an integrated analysis of historical narratives and archaeological evidence. Located in Upper Mesopotamia at a strategic crossroads between Anatolia, Mesopotamia, and the Iranian plateau, Nisibis functioned not only as a military outpost but also as a multifaceted center encompassing administrative, economic, and diplomatic activities. The research traces the city’s multi-layered historical development from the pre-Roman period through Parthian and early Sasanian influence, emphasizing the circumstances surrounding its incorporation into the Roman imperial system. Archaeological data reveal a settlement pattern in which military and civilian spaces were closely integrated, as evidenced by fortification systems, architectural remains, and ceramic assemblages indicating long-term urban continuity. During the period of intense Roman-Sasanian rivalry, Nisibis emerged as one of the most contested frontier cities, repeatedly subjected to sieges and defensive reinforcements. These features reflect the flexible and multi-dimensional nature of Roman frontier policy in the East, which relied not only on linear defenses but also on strategically positioned urban centers. The loss of Nisibis in the mid-fourth century AD marked a turning point in Roman eastern strategy, prompting a reconfiguration of the frontier system. Consequently, Nisibis represents a key case study for understanding the dynamic and adaptive character of Rome’s eastern border management.