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.
Christianity
A number of conflicts with Western Christianity over questions of doctrine and authority culminated in the Great Schism. Eastern Orthodoxy is the second largest single denomination in Christianity, with an estimated 225–300 million adherents.