John of Ephesus was a sixth-century bishop and a significant historian of the early Syriac Orthodox Church. Born in Amida around 507, he was a prominent leader of the non-Chalcedonian movement within the Byzantine Empire. As a prolific writer, he documented extensive ecclesiastical history and compiled biographies of holy figures to support his community. His writings provide rare, firsthand perspectives on major historical events, including the devastating Plague of Justinian and the political shifts affecting Miaphysite Christians during his lifetime.