Ioannes 32 was bishop of Regium (in Bruttium); he was one of three Italian bishops who attended the Third Council of Constantinople (the Sixth Ecumenical Council) in 680 and 681 as representatives of the hundred and twenty-five bishops who had earlier condemned monotheletism at the Council of Rome at Easter 680 (the other two were Ioannes 21 and Aboundantios 1); he attended all eighteen sessions of the Council: Riedinger II 2. 16-823 (= Mansi XI 209-669). He was sent to the Council by pope Agatho 1: Riedinger II 2. 56, line 7, 895, line 31 (= Mansi XI 236, 716). In the subscriptions to the statement of the faith, which condemned monotheletism, and to the Council, he is styled Ἰωάννης ἀνάξιος ἐπίσκοπος πόλεως τοῦ Ῥηγίου καὶ ἀποκρισιάριος πάσης τῆς συνόδου τοῦ ἁγίου καὶ ἀποστολικοῦ θρόνου τῆς πρεσβυτέρας Ῥώμης (or similar): Riedinger II 2. 780, lines 5-6, 823, lines 1-2, cf. II 2. 891, lines 26-27 (= Mansi XI 641, 669, cf. XI 689). In the lists of bishops attending the sessions, he is styled Ἰωάννου ἐπισκόπου πόλεως Ῥηγίου or similar: Riedinger II 2. 16, line 13, 28, line 17, etc. (= Mansi XI 209, 217, etc.). At the twelfth session (22 March) he was sent, with bishops Georgios 17 and Domitios 1 and with Paulos 3, Ioannes 60 and Agatho 3, to visit Makarios 1 and check whether certain documents brought before the Council were in fact his: Riedinger II 2. 560, line 3 (= Mansi XI 544-545). The Vita of pope Agatho by Anastasius Bibliothecarius names the three bishops sent to Constantinople as "Abundantium Paternensem, Iohannem Regitanum et Iohannem Portuensem" : Mansi XI 165 = Lib. Pont. 81. 3, cf. 82. 2. He is not recorded among the bishops who attended the Council of Rome. His absence is unexplained, especially in view of his selection as representative of this Council; no bishop of Regium is named as attending, and so presumably he was prevented from being there by some unknown reason. After the Sixth Ecumenical Council he was among those who signed the copy of the definition of the faith sent to the bishop of Rome, Agatho 1: Riedinger II 2. 891, lines 26-27 (= Mansi XI 689).

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