Theosostos 1 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | E IX |
| Dates | 824 (tpq) / 826 (taq) |
| Religion | Christian |
| Locations | Stoudios (Monastery of, Constantinople) (officeplace); Stoudios (Monastery of, Constantinople) (residence); Stoudios (Monastery of, Constantinople) |
| Occupation | Monk |
| Titles | Abbas (office) |
| Textual Sources | Theodorus Studita, Catechesis Parva, ed. E. Auvray (Paris, 1891) (homiletics); Theodorus Studita, Epistulae, ed. G. Fatouros, CFHB 31.1-2 (Berlin/New York, 1992) (letters) |
Theosostos 1 was a Stoudite monk and an abbas (ὁ ἀββᾶς Θεόσωστος: p. 745, line 48), whose death is mentioned by Theodoros 15 (Theodore the Stoudite) in a letter written between 824 and 826; Theodoros 15 refers also to the deaths of Prokopios 19 and Silas 1; Theod. Stud., Ep. 503, pp. 744-745, cf. Theod. Stud., Catech. Parva 109 (p. 374 Auvray) (also mention of his death).
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