Although it was initially headquartered in Egypt, it covered only the part of Egypt south of Assuan, where the population was primarily Nubian, and the Anglo-Egyptian Sudan as well as French colonies Chad and Niger.
Meskipun awalnya bermarkas besar di Mesir, keuskupan tersebut hanya meliputi bagian selatan Mesir dari Assuan, dimana penduduknya utamanya adalah orang Nubia, dan Sudan Inggris-Mesir serta koloni-koloni Prancis Chad dan Niger.