If I may throw in what might be a marginal addition to this thread, please note that I published a few years ago two articles that discuss the material and literary evidence for the connections between the Land of Israel/Palestine and Iran (or Iranian occupied Babylonia), primarily during the Roman/Byzantine periods.
* Maeir, A. M. "Sassanica Varia Palaestiniensia: A Sassanian seal from T. Istaba, Israel, and other Sassanian objects from the southern Levant." Iranica Antiqua 35 (2000): 159-183.
Safrai, Z., and A. M. Maeir. " אתא אגרתא ממערבא(" An Epistle Came from the West"): Historical and Archaeological Evidence for the Ties between the Jewish Communities in the Land of Israel and Babylonia during the Talmudic Period." The Jewish Quarterly Review (2003): 497-531.
Hope this helps,