Basilios 22 was bishop of Perberis or Perberaion (in the area of Thrace; see below and cf. Anastasios 1 and Maximos 10); in 787 he attended the Second Council of Nikaia (the Seventh Ecumenical Council) and was probably present at the last seven sessions, from 26 September to 23 November 787 (he is not attested at the first session on 24 September 787): Mansi XII 1110-XIII 486. In the list of those present at the seventh session he is styled Βασιλείου ἐπισκόπου Περβεραίου: Mansi XIII 372. Elsewhere he is styled Βασίλειος ὁ ὁσιώτατος ἐπίσκοπος Περβέρεως or similar: Mansi XII 1110 (Περβέρεως), XIII 149 (Περβεραίου), XIII 397 (Περβέρεως). 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 1110. 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 397. He is named in a group of bishops from Haemimontus and Thessalia.

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