Kosmas 21 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | VII |
| PmbZ No. | 4075 |
| Religion | Christian |
| Occupation | Bishop |
| Titles | Archbishop, unknown (office) |
| Seal Sources | Konstantipoulos, K.M., Byzantiaka Molybdoboulla tou en Athenais Ethnikou Nomismatikou Mouseiou (Athens, 1917); repr. from JIAN 5-10 (1902-07); Laurent, V., Le corpus des sceaux de l'empire byzatin, V, 1-3, L'église (Paris, 1963-72); II, L'administration centrale (Paris, 1981) |
Kosmas 21 was the archbishop of an unknown see; owner of a seal dateable to the seventh century: Laurent, Corpus V 1, 954 = Konstantopoulos, JIAN 5, no. 242. Obv.: image of a saint, probably St John rather than St Gregory, with the legend ὁ Θεολόγος. Rev.: +Κος - μα αρχ(ι)ε - πισκο(που). See Laurent, op. cit., pp. 749-750, note.
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