Eastern Orthodoxy by country
Based on the numbers of adherents, the Eastern Orthodox Church (also known as Eastern Orthodoxy) is the second largest Christian communion in the world after the Roman Catholic Church. The most common estimates of the number of Eastern Orthodox Christians worldwide is approximately 200–260 million. The numerous Protestant groups in the world, if taken all together, outnumber the Eastern Orthodox, but they differ theologically and do not form a single communion.
List of Christian denominations
Assyrian Christianity comprises churches who keep the traditional Nestorian Christology and ecclesiology of the historical Church of the East after the original church reunited with the Catholic Church, forming the Chaldean Catholic Church in 1552. The Assyrian Church of the East and the Ancient Church of the East together have over 0.6 million members as of 2018. Oriental Orthodoxy is the fourth largest communion of Christian churches, with approximately 76 million members. The Oriental Orthodox communion rejects the Council of Chalcedon in 451 and those after it. Other denominations such as the Eastern Orthodox Church, often erroneously label the communion as "Monophysite"; however, as the Oriental Orthodox do not adhere to the teachings of Eutyches, they themselves reject this label, preferring the term Miaphysite. Some of the Oriental churches, especially the Coptic Orthodox Church of Alexandria, claim origination by Saint Mark and his 1st-century missionary journeys.