The Eastern Orthodox Church denomination formed after the Great Schism in 1053 CE. They are concentrated in Central Europe, Eastern Europe and Asia.
The Eastern Orthodox have no supposedly infallible figure like the Roman Catholic pope, instead councils of leading churchmen decide matters of faith. The patriarch in Constantinople speaks for the Eastern Orthodox worldwide but has nowhere near the authority of the pope in Rome. Orthodox faith tends to be very traditional as well as patriarchal. [1]
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References
From Atheism.About.com
