Nikolaos 20 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | IX/X |
| Religion | Christian |
| Locations | Herakleia (Pontus) (officeplace); Herakleia (Pontus) |
| Occupation | Bishop |
| Titles | Bishop, Herakleia (Pontus) (office) |
| 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) |
Nikolaos 20 was bishop of Herakleia (probably of Pontus); owner of a seal dateable to the ninth or tenth century: Laurent, Corpus V 1, no. 877. Obv.: Virgin holding medallion of Child, between invocative monograms of Θεοτόκε (missing) and βοήθει. Rev.: +Νηκω - <λ>αῳ επησκ - ωπῳ Ερακλ - ηασ· αμ[ην]. His seal so closely resembles that of Konstantinos 107 (bishop of Herakleia in Pontus, not in Thrace as Laurent supposed; see Nesbitt and Oikonomides, DO Seals I, p. 136, note) that Nikolaos 20 was probably bishop in the same see and around the same period.
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