Georgios 55 was bishop of Kamoulianai (in Cappadocia); in 787 he attended the Second Council of Nikaia (the Seventh Ecumenical Council) and was probably present at all eight sessions, from 24 September to 23 November 787: Mansi XII 994-XIII 486. In the lists of those present at the first and seventh sessions he is styled Γεωργίου ἐπισκόπου Καμουλιανῶν: Mansi XII 994, XIII 368. Elsewhere he is styled Γεώργιος ὁ ὁσιώτατος ἐπίσκοπος Καμουλιανῶν or similar: Mansi XII 1098, XIII 385 (Mansi XIII 141 has Καμουλιάνων). At the second session he spoke in support of the traditional veneration of icons as described in statements from pope Hadrian I (Hadrianos 1) and condemned iconoclasts: Mansi XII 1098. At the fourth session he subscribed the statements read out from the Fathers in support of the veneration of icons: Mansi XIII 141. At the seventh session he subscribed the statement of the faith adopted by the Council: Mansi XIII 385.

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