Euphemianos 1 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | M/L IX |
| Dates | 877 (taq) / 877 (tpq) |
| Religion | Christian |
| Locations | Constantinople; Euchaita (Helenopontus) (officeplace); Euchaita (Helenopontus) (residence); Euchaita (Helenopontus) |
| Occupation | Bishop |
| Titles | Archbishop, Euchaita (Helenopontus) (office) |
| Textual Sources | Vita Ignatii Patriarchae, by Nicetas (BHG 817), PG 105.488-574) (hagiography) |
| Seal Sources | Laurent, V., Le corpus des sceaux de l'empire byzatin, V, 1-3, L'église (Paris, 1963-72); II, L'administration centrale (Paris, 1981) |
Euphemianos 1 was bishop (ἐπίσκοπος) of Euchaita; some time during the second patriarchate of Photios 1 (probably soon after 877) he was forced to resign by Photios 1 and his see was given to Photios 1's protégé Theodoros 174 Santabarenos: Nicetas, Vita Ignatii 572D (cited under Theodoros 174).
He is to be identified with the archbishop of Euchaita (Helenopontus) who owned a seal dateable to the second half of the ninth century: Laurent, Corpus V 1, no. 853. Obv.: St Theodoros, with the invocative formula Ἅγι[ε] Θε[όδωρε βοήθει]. Rev.: +Ἐφη[μ] - ιανῳ ἀρ[χ] - ιεπισκ(οπῳ) - <Ε>υχαϊτ -<ων>. He is attested at the Eighth Ecumenical Council in 869 (Mansi XVI 192 A), at the Photian Synod of 879/880 (Mansi XVII A, 373 D), and deposed in 882/886 (Grumel, Regestes, no. 527); see Laurent, op. cit., p. 663, note and PBE II.
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