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.
Estonia
Prior to 2011 census, The another major group, inhabitants who follow Eastern Orthodox Christianity, practised chiefly by the Russian minority and several to a smaller minority of Estonian population, and the Estonian Orthodox Church, which under the Russian Orthodox Church is the second largest denomination with 150,000 members. The Estonian Apostolic Orthodox Church, under the Greek-Orthodox Ecumenical Patriarchate, claims another 20,000 members. Thus, the number of adherents of Lutheranism and Orthodoxy, without regard to citizenship or ethnicity, is roughly equal. Catholics have their Latin Apostolic Administration of Estonia.