Antonios 40 | Prosopography of the Byzantine Empire |
| Floruit | M/L IX |
| Dates | 865 (taq) / 865 (tpq) |
| PmbZ No. | 566 |
| Locations | Kyzikos (officeplace); Kyzikos |
| Occupation | Bishop |
| Titles | Bishop, Kyzikos (office) |
| Textual Sources | Nicolaus I, Epistulae et Decreta, PL 119. 769-1182; ed. E. Perels, MGH, Epp. 6, pp. 257-690 (letters) |
Antonios 40 was archbishop of Kyzikos; he is named in a letter written by pope Nicolas I (Nikolaos 28) to the emperor Michael III (Michael 11) as one of the supporters of the patriarch Ignatios (Ignatios 1): Nicolaus I, Ep. 86 (PL 119. 956B).
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