Eastern Orthodox Church

==== True Orthodox ====

{{Main|Eastern Orthodox Church organization#True Orthodox}}

[[True Orthodoxy]] has been separated from the mainstream communion over issues of ecumenism and calendar reform since the 1920s.<ref name=politika2>{{cite web|url=http://www.politika.rs/rubrike/Drustvo/Ko-su-ziloti-pravoslavni-fundamentalisti.lt.html|title=Ko su ziloti, pravoslavni fundamentalisti|author=Beoković, Jelena|date=1 May 2010|publisher=[[Politika]]|trans-title=Who are Zealots, Orthodox Fundamentalists|access-date=5 August 2014}}</ref> The movement rejects the Ecumenical Patriarchate of Constantinople, the Moscow Patriarchate, and all churches which are in communion with them, accusing them of heresy and placing themselves under bishops who do the same thing. They adhere to the use of the [[Julian calendar]], claiming that the [[Revised Julian calendar|calendar reform in the 1920s]] is in contradiction with the ecumenical councils. There is no official communion of True Orthodox; and they often are local groups and are limited to a specific bishop or locality.