Ioannes 155 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | E IX |
| Dates | 815 (c.) / 815 (c.) |
| PmbZ No. | 3251 |
| Religion | Christian; Iconoclast |
| Locations | Constantinople (residence); Constantinople |
| Titles | Synkletikos (office) |
| Textual Sources | Vita Nicetae Hegoumeni Medicii, Auctore Theostericto (BHG 1341), AASS April I, Appendix, pp. xviii-xxviii (hagiography) |
Known as Spektas, Ioannes 155 was a member of the synkletos; an iconoclast, he was chosen in c. 815 by the emperor Leo V (Leo 15) to promote the cause of iconoclasm: Vita Nicetae Medicii 31 (εὗρεν δὴ ὀλίγους τῆς συγκλήτου, Ἰωάννην τὸν καλούμενον Σπέκταν). Cf. also Eutychianos 2.
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