- With the exception of Georgia and Bulgaria which withdrew in 1997 and 1998, and Estonia, all the Orthodox churches (Eastern) are members of the WCC.
- The church, part of the Carpatho-Russian Orthodox Diocese in America, uses English in services and shares the same liturgy as other Eastern Orthodox churches.
- The official Bible of the Eastern Orthodox Church contains the Septuagint text of the Old Testament, with the Book of Daniel given in the translation by Theodotion.
- Worldwide followers. The Eastern Orthodox Church has an estimated 225 to 300 million members, with about 5.6 million in the United States.
- According to Mead's Handbook of Denominations, The Greek Eastern Orthodox Church formed in 1054 when it split from the Roman Catholic Church.
- Smaller churches are autonomous and each have a mother church that is autocephalous. The Eastern Orthodox Church includes the following churches.
- The Roman Catholic Church believes in having a pope and the Eastern Orthodox Church does not, which is the biggest difference between the Churches .
- A more substantive disagreement between Catholics and the Eastern Orthodox concerns the role of the pope and the ecumenical councils in the Church.
- The Orthodox Catholic Church is commonly known as the Eastern Orthodox Church, partly to avoid confusion with the Roman Catholic Church.
- Two of the largest Eastern Christian sects are the Oriental Orthodoxy and the Eastern Orthodox Church.