Saint Maruthas or Marutha of Martyropolis was a monk who became bishop of Maypherkat in Mesopotamia (Meiafarakin) for a period beganing before 399 and still in office in 410. 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 was a friend of Saint John Chrysostom.
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 St. John Chrysostom. Later Maruthas was sent by Emperor Theodosius II to the court of Persia, where, notwithstanding the Magi, he won the esteem of King Yazdegerd I of Persia by his affability, saintly life, and, as is claimed, by his knowledge of medicine. 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. For 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:
He also wrote hymns on the Holy Eucharist, on the Cross, and on saints died in Shapur's persecution.
This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed (1913). "St. Maruthas". Catholic Encyclopedia. Robert Appleton Company.