Those who regard these councils as ecumenical often characterize the limitation of Ecumenical Councils to only seven to be the result of Jesuit influence in Russia, part of the so-called "[[Western Captivity of Orthodoxy]]."
An interesting external attestation to the consideration of this synod to be the '''Eighth Ecumenical Council''' is the [[Roman Catholic Church]]'s ''Catholic Encyclopedia'' (1907), which describes the council of 879-880 as the "Pseudosynodus Photiana," noting that the "Orthodox count [it] as the Eighth General Council."[http://www.newadvent.org/cathen/12043b.htm][http://www.newadvent.org/cathen/04312b.htm]
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