Sergios 121 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | E IX |
| PmbZ No. | 6659 |
| Religion | Iconoclast |
| Textual Sources | Theodorus Studita, Refutatio et Subversio Impiorum Poematum, PG 99, 436B-477A (theology) |
Sergios 121 was one of the authors of iconoclast epigrams inscribed on the Chalke Gate, whom Theodore the Stoudite (Theodoros 15) attacked; he is described as νέος χριστομάχος: Theod. Stud., Refutatio 435A, 436B, 448B, 476B.
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