The Coptic Orthodox Church is the portion of the Church of Alexandria which broke from the Byzantine churches in the wake of the Fourth Ecumenical Council in Chalcedon in 451. Sharing a common heritage before with the Chalcedonian Church of Alexandria, it traces its origins to the Apostle Mark. The church is one of the Oriental Orthodox churches. Its leader is the Coptic Pope of Alexandria, currently Pope Shenouda III. The Coptic Orthodox Church of Alexandria cares for about 18 million Coptic Orthodox Christians in Egypt and abroad, besides being the Mother Church of both the Ethiopian and Eritrean Orthodox Churches. More than 95% of the Christians of Egypt are Coptic Orthodox, but other "Patriarchates/Patriarchs of Alexandria" also exist (Coptic Catholic, Greek/Latin Catholic and Greek Or