Ray and Pahlaw in the context of Sasanian Iran

Ray—located near present-day Tehran—is among the most important historical areas in Iran and the plains to the south of Tehran have always been densely inhabited and intensely cultivated thanks to the waters coming from Mount Tochal and the Alborz Mountains. Historical records and archeological data for the early history of the city in the Median, Achæmenid, Seleucid, and even Parthian periods are not exhaustive. In the present study, an attempt is made to bring together primary and secondary sources to define better the role that the province of Ray played during the Sasanian period, during which it was host, among others, to a huge military camp crucial to manning the northern and eastern frontier. Combined archeological and historical evidence shows that Ray has played an important and pivotal role in the history of Iran from the first years of the formation of the Sasanian Empire to the very last years of the empire, leaving a lasting memory in the Islamic literary tradition.