The Antiochian Orthodox Church reference article from the English Wikipedia on 24-Apr-2004
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Antiochian Orthodox Church

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The Antiochian Orthodox Church is one of the five churches that comprised the One Holy Catholic and Apostolic Church before the Great Schism, and today is one of the autocephalous Eastern Orthodox Churches. It claims to be the sole legitimate successor to the Christian community founded in Antioch by the Apostle St. Peter. Its North American branch is autonomous, i.e., although the Patriarch of Antioch appoints its head bishop, he exercises no further authority over it.

The seat of the patriarchate was formerly Antioch, in what is now Turkey, but is now Damascus, Syria.

The claim is disputed by the Syrian Orthodox Church of Antioch, part of Oriental Orthodoxy; the schism between the two occured over the christology of the Council of Chalcedon. The Syrian Catholic Church, in communion with the Roman Catholic Church, also claims to hold the patriarchate.