Symeon 27 was a Stoudite monk; he was the addressee of five letters from Theodoros 15 (Theodore the Stoudite), the earliest written in 809, the last in 821: Theod. Stud., Ep. 165, pp. 286-287 (a. 809); 342, p. 482; 368, p. 500; 388, pp. 538-539 (all addressed Συμεὼν τέκνῳ) and 433, pp. 608-610 (a. 821; addressed τοῖς ἠγαπημένοις πνευματικοῖς τέκνοις τε καὶ ἀδελφοῖς Λαυρεντίῳ, Συμεών, Διονυσίῳ, Ποιμένι, Λιτοϊῳ καὶ τοῖς λοιποῖς ὧδε κἀκεῖσε διεσπαρμένοις; see Dionysios 6, Laurentios 4, Litoios 1 and Poimen 1). He is mentioned in one other letter, written in 809/811, when he and Litoios 1 (τῶν πνευματικῶν ἡμῶν τέκνων Λιτοϊου καὶ Συμεὼν: p. 849, line 8) took a letter of Theodoros 15 to the hegoumenos of St Sabas in Jerusalem, Basilios 134: Theod. Stud., Ep. 555, pp. 849-852. He was a cousin of the monk Akakios 3: Theod. Stud., Ep. 342, p. 482, line 13. During the iconoclast persecution under Leo V (Leo 15) he acted as temporary hegoumenos for a number of exiled monks: Theod. Stud., Ep. 368, p. 500, line 5 (προηγούμενον), cf. Ep. 388, p. 538, line 7 (ἡγοῦ τῶν ἀδελφῶν σου). In 818 Symeon 27 wrote to Theodoros 15; at the time he had nine Stoudite monks with him and apparently others too (καὶ ἕτεροι πατέρες συμπνέουσί σοι: p. 539, line 18); he is addressed as υἱέ μου ἀγαπητέ (p. 538, line 7): Theod. Stud., Ep. 388, pp. 538-539.

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