A monk and a priest, Eustratios 22 was an iconophile, serving under an iconoclast bishop, Gregorios 145; Eustratios and his fellow monk Hilarion 8 sent queries to Theodoros 15 (Theodore the Stoudite) concerning the relations between the orthodox (i.e. supporters of the veneration of icons) and clergy who had defected from the cause; in a letter addressed to the monk Methodios 5, written between 821 and 826, Theodoros gave them his answers; they had also sent gifts to Theodoros, which he reciprocated: Theod. Stud., Ep. 549, pp. 831-838 (τῶν πνευματικῶν ἡμῶν ἀδελφῶν Ἱλαρίωνός τε καὶ Εὐστρατίου, p. 831, lines 8-9; also περὶ πρεσβυτέρων ὀρθοδόξων, ἤγουν Ἱλαρίωνος καὶ Εὐστρατίου μοναχοῦ, p. 838, lines 154-155).

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