According to Agathangelus, Tiridates went to Rome with Gregory, Aristaces, son of Gregory, and Albianos, head of the other priestly family, to make a pact with Constantine, newly converted to the faith, and receive a pallium from Silvester.
Following the same policy he sent Aristaces in 325 to the council of Nice.
Gregory is related to have added a clause to the creed which Aristaces brought back; he became a hermit on Mount Sebuh about the year 332, and died there.
In the Loth century Gregory of Narek wrote against them in Armenian, and in the 11th Aristaces of Lastivert and Paul of Taron in the same tongue.
In twentieth year of catholicate of Gregory and thirtyseventh of Trdat, the king, on return of Aristaces from council of Nice, bringing the Nicene creed and canons.