Georgios 21 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | M/L VII |
| Dates | 680 (taq) / 681 (tpq) |
| PmbZ No. | 1978 |
| Variant Names | Georgius |
| Religion | Christian; Anti-monothelete |
| Locations | Kos (Insulae) (officeplace); Kos (Insulae); Constantinople |
| Occupation | Bishop |
| Titles | Bishop, Kos (office) |
| Textual Sources | Constantinople, Third Council of (Sixth Ecumenical Council), ed. R. Riedinger, Concilium Universale Constantinopolitanum Tertium, ACO II.2. 1 (Berlin, 1990-1992); also cited from Mansi XI passim (conciliar) |
Georgios 21 was bishop of Kos; Georgios 21 attended the Third Council of Constantinople (the Sixth Ecumenical Council) in 680 and 681 and was present at all eighteen sessions: Riedinger, pp. 18-828 (= Mansi XI 212-680). In the subscriptions to the statement of the faith, which condemned monotheletism, and to the Council, he is styled Γεώργιος ἐλέει Θεοῦ ἐπίσκοπος τῆς Κώων νήσου: Riedinger, p. 794, line 25, p. 828, line 17 (= Mansi XI 653, 680). In the lists of those attending each session he is styled Γεωργίου ἐπισκόπου Κώου: Riedinger, p. 18, line 13, p. 30, line 15 etc. (= Mansi XI 212, 220, etc.).
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