Ioannes 87 was bishop of Apros (in Europa); 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 Ἰωάννου ἐπισκόπου Ἄπρου or similar (Ἄπρου has no accent or breathing in the text): Mansi XII 994, XIII 368. Elsewhere he is styled Ἰωάννης ὁ ὁσιώτατος ἐπίσκοπος τοῦ Ἄπρου or similar: Mansi XII 1095, XIII 141, 385 (ἐπίσκοπος πόλεως Ἄπρου).

At the second session Ioannes 87 spoke in support of the traditional veneration of icons as described in statements from pope Hadrian I (Hadrianos 1) and condemned iconoclasts: Mansi XII 1095. At the fourth session he subscribed to 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.

For Apros, once called Nova Theodosiopolis, see Jones, Cities, p. 380, n. 36.

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