Ioannes 503 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | VI/VII |
| PmbZ No. | 2767 |
| Religion | Christian |
| Occupation | Bishop |
| Titles | Bishop, unknown (office) |
| Seal Sources | Laurent, V., La collection Orghidan (Paris, 1952) |
Ioannes 503 was a bishop; owner of a seal dateable to the sixth or seventh century: Laurent, Orghidan 576. Obv.: cruciform monogram of Ιωαννου. Rev.: monogram of ἐπισκόπου.
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