The advent of Khusro I (531-579) heralded a brilliant period in the history of the Middle East, during which decisive directions were taken. Throughout his reign of almost fifty years, a period during which this king pursued an ambivalent religious policy, the different Christian communities of the Sasanian Empire developed between cultural conflicts and strategies. The study of this spatio-temporal microcosm reveals their dynamism and confirms their deep investment in Iranian society, that expressed an adaptation to administrative changes and external influences, but also, simultaneously, a capacity for internal reorganization and a powerful spiritual renewal. This development sometimes took place at the expense of identity. It was a half-century of Late Antiquity that decisively shaped the history of the mentalities of the Christian communities in Iranian territory.
