In the mid-6th century, Grigor, the general of the Sasanian king’s armies and a converted from Zoroastrianism to Christianity, was put to death. This event brings about the conversion of several Zoroastrian notables such as Yazd-panāh, a judge who also died as a martyr three years later, and the courtier ʿAwira. The reign of King Khusrō I (531–579) was a key-chapter in the history of the Persian Empire, but also for the Church of the East, some members of which were involved in the Sasanian administration. These East-Syrian historical texts, which are among the few passions of this period in Syriac, have received little scholarly attention. This volume offers a critical text and commentary, as well as the first translation into English of these two martyr texts. Written by contemporaries, they provide valuable information regarding socio-religious life and the political context. They demonstrate how Persian Christians, despite sporadic persecution, were able to maintain a distinct identity while simultaneously acculturating to the norms of Iranian society.