Bryennios 1 was a basilikos spatharios and strategos of Dalmatia; owner of a seal dateable to the mid ninth century: Schlumberger, Sig., p. 205, no. 1 (facsimile) = p. 626, no. 2 = Mordtmann, "Byz. Molybdoboullon" II, p. xxix. Obv.: invocative monogram of Κύριε βοήθει with the legend τῷ σῷ δούλῳ. Rev.: +Βρυε - ν(ίῳ) β(ασιλικῷ) σπαθ(αρίῳ) (καὶ) - [στ]ρ(α)τ(ηγῷ) Δαλ - ματιας. Schlumberger records another seal possibly belonging to the same person but at a slightly later stage of his career; his source was Sorlat-Dorigny, who saw it in the Bazaar at Constantinople. Schlumberger gives the following text: Θεοτόκε βοήθει τῷ σῷ δούλῳ Βρυενί(ῳ) β(ασιλικῷ) (πρωτο)σπαθ(αρίῳ) (καὶ) στρ(α)τ(ηγῷ) Δαλματί(ας). If this is the same man he had been raised in status from spatharios to protospatharios apparently during his term of office as strategos of Dalmatia. The reading of the name is questioned by W. Seibt, Review of J. Ferluga, L' amministrazione bizantina in Dalmazia (Venice, 1978), in JÖB 30 (1981), p. 339, note 4. He also reads the office as ἄρχων Δαλματίας and prefers a date in the early ninth century, referring to a similar seal, DO 58.106.2227; this is now published as DOSeals I 14.3 (= PBE I, Anonymus 80) (photograph in DO Seals I; little is visible of the obverse but the layout of the last three lines of the reverse of both seals, all that survives for comparison, is very similar). Cf. Winkelmann, Rangstruktur, p. 116.

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