Ioannes 140 was bishop of Nikomedeia; an iconoclast, he was anathematised at the seventh session (on 13 October 787) of the Second Council of Nikaia (the Seventh Ecumenical Council) in 787 as one of the originators of the iconoclast heresy; the other was Konstantinos 73: Mansi XIII 400 (Ἰωάννῃ Νικομηδείας καὶ Κωνσταντίνῳ Νακωλείας, τοῖς αἱρεσιάρχαις ἀνάθεμα. ἐξουδένωσαν τὴν εἰκόνα τοῦ κυρίου καὶ τῶν ἁγίων αὐτοῦ. ἐξουδένωσεν αὐτοὺς ὁ κύριος), XIII 416. He presumably was a contemporary and colleague of Konstantinos 73 when the heresy began, in the 720s. Possibly identical with Atzypios 1.

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