Citizenship: Dioscorus I
was bishop of
Alexandria.
Sources:
E. W. Brooks and E. W. Brooks, eds.,Letters I to LXI,inA Collection of Letters of Severus of Antioch , from Numerous Syriac Manuscripts, Patrologia Orientalis 12 (Paris: Firmin-Didot et cie, 1919), p: 323, part: 49.