Leo 47 was bishop of Andida in Pamphylia; 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 1000-XIII 486. In the list of those present at the first session he is missing from the Greek version but is recorded in the Latin version, where he is styled "Leone episcopo Andidensium": Mansi XII 1000. In the list of those present at the seventh session he is styled Λέοντος ἐπισκόπου Ἀνδίδων: Mansi XIII 372. Elsewhere he is styled Λέων ὁ ὁσιώτατος ἐπίσκοπος Ἀνδίδων or similar: Mansi XII 1107, XIII 149, XIII 396 (ἐπίσκοπος Δίδων). 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 1107. At the fourth session he subscribed the statements read out from the Fathers in support of the veneration of icons: Mansi XIII 149. At the seventh session he subscribed the statement of the faith adopted by the Council: Mansi XIII 396.

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