Career
He"s believed to have died before 420. He is venerated as a Saint by Catholics, Greek Orthodox believers and Copts, his feast being kept on 4 December. He brought into his episcopal city the relics of so many martyrs that it received the surname Martyropolis.
He acted as an ambassador between the East Roman Emperor and the Persian Emperor.
In the interests of the Church of Persia, which had suffered much in the persecution of Shapur II, he came to Constantinople, but found Emperor Arcadius too busily engaged in the affairs about the exile of Saint John Chrysostom. So Marutha managed to negotiate a peace between the two empires.
He was present at the general First Council of Constantinople in 381 and at a Council of Antioch in 383 (or 390), at which the Messalians were condemned. Foreign the benefit of the Persian Church he is said to have held two synods at Ctesiphon.
A great organizer, he was one of the first to give a regular structure to the church, helped in his mission by the catholicos Isaac.
His writings include:
Acts of the Persian Martyrs (these acts remember the victims of the persecution of Shapur II and Yazdegerd I)
History of the Council of Nicaea
A translation in Syriac of the canons of the Council of Nicaea
A Syrian liturgy, or anaphora
Commentaries on the Gospels
Acts of the Council of Seleucia-Ctesiphon (26 spurious canons of a synod held in 410)
He also wrote hymns on the Holy Eucharist, on the Cross, and on saints killed in Shapur"s persecution.