Eastern Orthodoxy

Major branch of Christianity

Eastern Orthodoxy, otherwise known as Eastern Orthodox Christianity or Byzantine Christianity, is one of the three main branches of Chalcedonian Christianity, alongside Catholicism and certain forms of Protestantism. Like the Pentarchy of the first millennium, the mainstream (or "canonical") Eastern Orthodox Church is organised into autocephalous churches independent from each other. There are 17 mainstream autocephalous churches in Eastern Orthodoxy, plus other autocephalous churches unrecognized by the mainstream ones.

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