Konstantinos 54 was bishop of Komba in Lycia; 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 998-XIII 486. In the list of those present at the first and seventh sessions he is styled Κωνσταντίνου ἐπισκόπου Κόμβων: Mansi XII 998, XIII 372 (Κώνστα; the Latin version, at XIII 371, reads "Constantino"). Elsewhere he is styled Κωνσταντῖνος ὁ ὁσιώτατος ἐπίσκοπος Κόμβων or similar: Mansi XII 1106 (Κόμβρων), XIII 148, XIII 393 (Κώνστας, repeated in the Latin version, at XIII 394). At the second session he supported the traditional veneration of icons as described in statements from pope Hadrian I (Hadrianos 1) and condemned iconoclasts: Mansi XII 1106. At the fourth session he subscribed the statements read out from the Fathers in support of the veneration of icons: Mansi XIII 148. At the seventh session he subscribed the statement of the faith adopted by the Council: Mansi XIII 393.

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