Ioannes 578 | Prosopography of the Byzantine Empire |
| Floruit | VIII |
| PmbZ No. | 3047 |
| Seal Sources | Laurent, V., Les sceaux byzantins du médaillier Vatican (Vatican City, 1962) |
Ioannes 578 was the owner of a seal dateable to the eighth century; he is styled doulos of the Theotokos: Laurent, Vat. 212. The name and title read: Ἰωάννου δούλου τῆς Θεοτόκου.
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