Eastern Orthodox Church
The Eastern Orthodox Church is defined as the Eastern Christians which recognise the seven ecumenical councils and usually are in communion with the Ecumenical Patriarchate, the Patriarchate of Alexandria, the Patriarchate of Antioch, and the Patriarchate of Jerusalem.
Distinctions
The content for Distinctions is from Wikipedia.
The Eastern Orthodox Church, also called the Orthodox Church, Greek Orthodox Church, or officially the Orthodox Catholic Church, is the second-largest Christian church, with approximately 220 million baptised members. It operates as a communion of autocephalous churches, each governed by its bishops via local synods.