is the fourth largest communion of Christian churches, with about 76 million members worldwide. As one of the oldest religious institutions in the world, it has played a prominent role in the history and culture of Abyssinia, Armenia, Egypt, Sudan and parts of the Middle East and India.composed of six autocephalous churches: the Coptic Orthodox Church of Alexandria, the Syrian Orthodox Church of Antioch, the Armenian Apostolic Church, the Ethiopian Orthodox Church, the Eritrean Orthodox Tewahedo Church, and the Malankara Orthodox Syrian Church