Tryphon was Patriarch of Constantinople from 928 to 931. A monk in the imperial capital before his elevation, he was renowned for his meekness and was raised to the patriarchal throne by the Byzantine emperor Romanos I Lekapenos following the death of his predecessor, Stephen II.
Tryphon's appointment was tied to a political condition: the emperor intended the patriarchate for his own son, Theophylact, and so Tryphon was installed effectively as a placeholder, on the understanding that he would step aside once the boy came of age. He accepted the office in this spirit and, according to the synaxarion, governed the Church wisely during his brief tenure.
When the time came for Theophylact to assume the throne, Tryphon was removed through a deception engineered by the emperor's advisors. Maneuvered into signing a document under false pretenses, he was thereby made to resign, and was put out of the patriarchal residence. He returned to his monastery and lived out his final period as a simple monk, reposing in 933.