Who is noted for their work on the history of Egypt's largest Christian church?
Menassa Youhanna: Father Menassa Youhanna (1899–1930) was a Coptic priest, historian and theologian, most noted for his work on the history of the Coptic Orthodox Church. Coptic Orthodox Church of Alexandria:  With 18–22 million members worldwide, whereof about 20 million are in Egypt (see Demographics section below), it is the country's largest Christian church.
Father Menassa Youhanna