Dionysios 6 was a Stoudite monk. In 821 he with Laurentios 4, Litoios 1, Poimen 1, Symeon 27 and other monks who were then living scattered in exile were the joint addressees of a letter of exhortation and hope from Theodoros 15 (Theodore the Stoudite) at the end of the persecution under Leo V: Theod. Stud., Ep. 433 (Κατηχητική. τοῖς ἠγαπημένοις πνευματικοῖς τέκνοις τε καὶ ἀδελφοῖς Λαυρεντίῳ, Συμεών, Διονυσίῳ, Ποιμένι, Λιτοίῳ καὶ τοῖς λοιποῖς ὧδε κἀκεῖσε διεσπαρμένοις). He is mentioned in several other letters of Theodoros 15 written between 816 and 826: Theod. Stud., Epp. 168 (M/L 816), 223 (M/L 816), 265 (L 816/E 817), 267 (L 816/E 817), 273 (E/M 818), 276 (c. 818), 377 (M/L 817), 447 (c. 821/826). In mid or late 816 Theodoros 15 asked Laurentios 4 to give his greetings to Dionysios 6 (τὸν ἀδελφόν μου καὶ ἀγαπητὸν υἱὸν Διονύσιον): Theod. Stud., Ep. 168. About the same time he asked Naukratios 1 to send Dionysios 6 to see Ioseph 3: Theod. Stud., Ep. 223. In late 816 or early 817 he brought news from Ioseph 3 both by letter and by word of mouth, which Theodoros 15 records in his reply to Ioseph 3: Theod. Stud., Ep. 265. He also brought news to Theodoros 15 of the bishop of Miletos, Ignatios 19, whom he had met in his place of exile at this time: Theod. Stud., Ep. 267. By late 817 he had travelled to Rome with Euphemianos 4 and returned safely with news by letter and word of mouth from Methodios 1 and the bishop of Monembasia (Ioannes 458): Theod. Stud., Ep. 273 (to Basilios 135, at Rome), Ep. 377. In 818 also he was sent by Theodoros 15 with a letter to the patriarch of Jerusalem (Thomas 60); described as reliable and well able to supplement the letter by word of mouth: Theod. Stud., Ep. 276. During the persecution under Leo V (Leo 15) he was closely associated with Anthimos 16: Theod. Stud., Ep. 447 (addressed to Anthimos, between 821 and 826). He had twice been imprisoned: Theod. Stud., Ep. 456. He was an elderly man when he died, between 821 and 826, while returning from a visit to Theodoros 15; he fell ill near the monastery of Myele and was taken in and nursed by the monks but failed to recover and died there; he had a long and distinguished record of service since his boyhood, having suffered in the persecution and carried out his orders faithfully, including travelling to Rome where he won plaudits for his abilities: Theod. Stud., Ep. 456 (to the monks of Myele), Ep. 457. His death was commemorated by Theodoros 15 in an epitaph which records his qualities of obedience and his travels in the cause of orthodoxy (Τάφος πέφηνα Διονυσίου μάλα, ξένου μοναστοῦ, πυκτικοῦ, κατηκόου, πολλοὺς δραμόντος ὀρθοδοξίας δρόμους καὶ μαρτύραθλον ἐξαποίσαντος τέλος): Theod. Stud., Epigr. 119 (addressed εἰς Διονύσιον).

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