The Historical Geography of Reishahr Port from Old Era Until the Fall of the Sassanid Dynasty

Reishahr is the name of an old port near Persian Gulf hot waters. This port, which today is part of Bushehr province, has an old history full of ups and downs. In inscriptions and monuments which have remained in the area, the names like Lyan, Bakht Ardeshir, Rioardeshir and finally Reishahr could be found. This area had a special significance in Iran in old era. Not just geographically and strategically, but also economically and culturally. With collapse of Sassanid dynasty, Reishahr also lost its central role and importance in Persian Gulf geography and over time, it has rarely been mentioned since in geographical resources. In this article, with investigation of geographic, historic, cultural and commercial importance of Reishahr in old era, the reasons for the decline of Reishahr port in Sassanid dynasty have been analyzed.