Ioannes 320 was basilikos protospatharios and epi tou eidikou logou; owner of a seal dateable to the early ninth century: Zacos II 928. Obv.: peacock, with tail spread; circular inscription reading: ....τω σω δουλ(ω). Rev.: + Ιωαν - ν' β' α' σπα - θ' (και) επ' του ι - δ' λογ. The name and titles read: Ἰωάννῃ βασιλικῷ πρωτοσπαθαρίῳ καὶ ἐπὶ τοῦ εἰδικοῦ λόγου. Possibly identical with Ioannes 321.

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