Konstantinos 259 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | M IX |
| Dates | 834 (n.) / 835 (ob.) |
| Textual Sources | Grierson, P., A Catalogue of the Byzantine Coins in the Dumbarton Oaks Collection and in the Whittemore Collection, II: Phocas to Theodosius III, 602-717; III: Leo III to Nicephorus III 717-1081 (numismatics) |
Konstantinos 259 was the son of the emperor Theophilos (Theophilos 5); the only evidence for him is from the coins and seals of his father, from which it appears that a son was born to the emperor in c. 834 and died while still in infancy; see Grierson, Catalogue 3.1, pp. 406-416, 419, 425, 430, 434, 442-3, 446-7, 450-1, with plates xxii-xxiii and cf. Treadgold, Revival, p. 283, with p. 284, fig. 44 (where the relevant coins are also illustrated). For a seal naming Theophilos, Michael III and Konstantinos, see J. Jurukova, Neues byzantinisches Kaisersiegel aus Bulgarien, in Vekove 7, Hf 4 (1978), pp. 73-76. See also Treadgold, "The Problem of the Marriage of the Emperor Theophilus", in GRBS 16 (1975), p. 333. See also Konstantinos 232.
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