Coptic pope (patriarch) of Alexandria, was the fifty-eighth patriarch of the See of Saint Mark (920/21–932/33). His twelve-year reign was long when compared to other patriarchs of his era. The History of the Patriarchs affords him only a brief treatment, despite the length of his reign, and secondary sources citing Abu al-Makarim’s History of Churches and Monasteries indicate he receives equally little commentary within this text as well.
Cosmas III came to power after Gabriel I (910–921), with no noted complications existing in the record surrounding the succession. It is not recorded from which monastery he came prior to being named patriarch. Little is said about Cosmas III’s person or character, and only two linked events are commented upon in his rule between the two previously mentioned sources.
While the century before had been marked with wars and tensions that had further divided the churches of Egypt and Abyssinia ...