Theodoros 343, known as Theodoros Spoudaios, was a disciple (μαθητής) of the bishop of Rome, Martinos 6, whom he accompanied to Constantinople; he wrote an account of the exile and sufferings of Martinos 6 and of Maximus Confessor (Maximos 10) and Anastasios 1, based on a letter written by Anastasios 66: Theod. Spoud., Hypomnesticum, praef., p. 67. He also used information from other works written by Anastasios 66 during the third exile of Maximos 10, which he saw and read himself and some of which he inherited: Theod. Spoud., Hypomnesticum (Gk), 1, p. 67, 2, pp. 69-70, (Lat) I, 193; II, 195. He was accompanied by his colleague and fellow monk Theodosios of Gangra (Theodosios 75) on a visit to Lazike in 668, when they were given the documents written by Anastasios 66 during his last exile, by the hegoumenos Gregorios 148: Theod. Spoud., Hypomnesticum (Gk), 6, pp. 75-77, Hypomnesticum (Lat), VII, 199.

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