Arsenios 6 was a monk living in Jerusalem, the joint-addressee with Isaakios 10 of a letter from Theodoros 15 (Theodore the Stoudite) in 818 (for the date, see Fatouros, pp. 319*-320*); Arsenios 6 and Isaakios 10 had briefly visited Constantinople once, around the start of the iconoclast persecution (under Leo V (Leo 15), in c. 815), when they had met Theodoros 15; they wrote to Theodoros 15 to explain why they were unable to travel back to the West, and Theodoros 15 replied telling them that he had already written to the patriarch (Thomas 60, patriarch of Jerusalem, Ep. 276) and the bearer of this letter (Dionysios 6) would give them information about the persecution; Arsenios 6 and Isaakios 10 are referred to as ἡ ἁγία ὑμῶν δυάς and ὑμῖν γε τοῖς ἁγιωτάτοις πατράσιν: Theod. Stud., Ep. 279 (addressed τοῖς ἐν τῇ ἁγίᾳ πόλει μονάζουσιν Ἰσαὰκ καὶ Ἀρσενίῳ).

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