Traditionalist Schisms
- Greek Old Calendarists Matthewites
- Greek Old Calendarists Florinites
- Smyrnaean Orthodox Church
- Holy Orthodox Church in North America
- Orthodox Church of Greece (Holy Synod in Resistance)
- Old Calendar Romanian Orthodox Church
- Old Calendar Bulgarian Orthodox Church
- Churches of the Old Believers movement:
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- Russian Orthodox Old-Rite Church
- Lipovan Orthodox Old-Rite Church
- Russian Old-Orthodox Church
- Pomorian Old-Orthodox Church
Read more about this topic: List Of Orthodox Churches, Eastern Orthodoxy, Eastern Orthodox Churches (not in Communion)