The articles here aim to develop and expand Professor Garsoïan’s earlier research on the bilateral influences on Early-Christian Armenia, between Byzantium and the Sasanians. On the one hand, they continue her examination of Armenia’s essentially Iranian society and institutions in the 4th-7th centuries; on the other, they are directed to an investigation of its autocephalous Church. This maintained relations with the Antiochene Christological school it shared with the Church of Persia longer than has been generally admitted, but simultaneously brought about an ideological transformation through which Christianity came to define the Armenian identity in the national tradition.