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Born on 18 February 1872 in El-Mahalla El-Kubra, Egypt died on 31 August 1945 in Cairo.
Before becoming a Pope he was the Metropolitan of Asyut in Egypt , he is the second Metropiltan to become a Pope in the history of the Coptic Orthodox Church of Alexandria. The first Metropolitan to become a Pope was Pope John XIX 
Due to him accepting the Post there was a disagreement between him and Habib Elmasry who was the secretary of the General Congregation Council (Elmagles Elmelly Ela'am) of the Coptic Orthodox Church of Alexandria at some stage. Mr Elmasry was the father of the Coptic historian Iris Habib Elmasry and she had documented these incidents in her book about the history of the Coptic Orthodox Church.
During his pontificate, he did not ordain any Bishop or Metropolitan and this was taken as a symbol of his regret to accepting the position of the Pope of Alexandria despite being a Metropolitan beforehand.
The seat of the Pope in Cairo during his papacy remained in the Saint Mark's Coptic Orthodox Cathedral in Azbakeya in Cairo.
- Patriarch of Alexandria
- Pope Shenouda III of Alexandria
- The Holy Synod of the Coptic Orthodox Patriarchate of Alexandria
- List of Coptic Orthodox Popes of Alexandria
- Oriental Orthodoxy
- Christianity in Africa
- Eastern Orthodoxy
- History of the Coptic Church, Iris Habib Elmasry
ar:مكاريوس الثالث (بابا الإسكندرية)