Question: What church based in Egypt, Northeast Africa and the Middle East, also features the former Christian diocese, Diocese of Buto? 
Related documents: [0]  [DOC] The Diocese of Buto (Latin Butus, Greek Butos) is a former Christian diocese and titular see of both the Roman Catholic and Coptic Orthodox Churches, with see in the Ancient City of Buto in the Nile Delta of Egypt. [END] 
[1]  [DOC] The Coptic Orthodox Church of Alexandria is an Oriental Orthodox Christian church based in Egypt, Northeast Africa and the Middle East. The head of the Church and the See of Alexandria is the Patriarch of Alexandria on the Holy See of Saint Mark, who also carries the title of Coptic Pope. The See of Alexandria is titular, and today the Coptic Pope presides from Saint Mark's Coptic Orthodox Cathedral in the Abbassia District in Cairo. 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. [END] 
Answer: 
Coptic Orthodox Church of Alexandria
Coptic Orthodox Church of Alexandria