Theoktistos 5 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | E IX |
| Dates | 815 (taq) / 824 (tpq) |
| Religion | Christian; Iconophile |
| Locations | Medikion (Monastery of, Bithynia) (officeplace); Constantinople (residence); Medikion (Monastery of, Bithynia) (residence); Constantinople; Medikion (Monastery of, Bithynia) |
| Occupation | Hegoumenos; Monk |
| Titles | Hegoumenos, Medikion (Bithynia) (office) |
| Textual Sources | Vita Nicetae Hegoumeni Medicii, Auctore Theostericto (BHG 1341), AASS April I, Appendix, pp. xviii-xxviii (hagiography) |
Theoktistos 5 was a young monk who served Niketas of Medikion (Niketas 43) when the latter was imprisoned in Constantinople by Ioannes 5 (Ioannes grammatikos) (in 815); later he was the successor of Niketas as hegoumenos of the monastery of Medikion: Vita Nicetae Medicii 40.
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