Theosteriktos 1 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | E/M IX |
| Dates | 824 (taq) / 824 (tpq) |
| Religion | Christian; Iconophile |
| Locations | Medikion (Monastery of, Bithynia) (residence); Medikion (Monastery of, Bithynia) |
| Occupation | Monk |
| Textual Sources | Vita Nicetae Hegoumeni Medicii, Auctore Theostericto (BHG 1341), AASS April I, Appendix, pp. xviii-xxviii (hagiography) |
Theosteriktos 1 was a disciple of Niketas of Medikion (Niketas 43); he wrote the Life of Niketas (a funeral oration); he was a monk at Medikion: Vita Nicetae Medicii, title (p. XXIIA) (Ἐπιτάφιος εἰς τὸν ὅσιον πατέρα ἡμῶν καὶ ὁμολογήτην Νικήταν συγγραφεὶς ὑπὸ Θεοστηρίκτου μαθητοῦ αὐτοῦ τοῦ μακαριωτάτου). He knew Niketas 43 personally and wrote the work after the death of Niketas in 824. When the saint's body was brought back to Medikion in 824, Theosteriktos was among those present on the shore to greet its arrival: Vita Nicetae Medicii 48.
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