Longinus (Greek: Λογγῖνος; fl. 565–580) was a Byzantine Monophysite missionary and the first ordained Christian bishop in Nubia. The main sources for his life are his contemporary and fellow Monophysite, John of Ephesus, who knew him; the 9th-century historian Eutychius of Alexandria; and the 15th-century Muslim historian al-Maqrizi.[1] John includes a letter written by Longinus in his chronicle.[2]