Kosmo 1 | Prosopography of the Byzantine Empire |
| Sex | F |
| Floruit | M/L VIII |
| PmbZ No. | 4148 |
| Locations | Holy Apostles (Church of the, Constantinople) (burialplace) |
| Textual Sources | Constantine Porphyrogenitus, De Ceremoniis Aulae Byzantinae Libri II, ed. J. J. Reiske, CSHB (Bonn, 1829); also ed. (in part) A. Vogt (Paris, 1935, repr. 1967) (history) |
Kosmo 1 was the sister of the emperor Constantine V (Konstantinos 7) and of Eirene 12; all three were buried in the Mausoleum of Justinian at the Church of the Holy Apostles at Constantinople: Const. Porph., Cer. II 42 (Reiske, p. 645). See Rochow, Theophanes, pp. 98ff., Konstantin V, p. 222.
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