Rite syriaque oriental

The East Syriac Rite or East Syrian Rite, also called the Edessan Rite, Assyrian Rite, Persian Rite, Chaldean Rite, Nestorian Rite, Babylonian Rite or Syro-Oriental Rite, is an Eastern Christian liturgical rite that employs the Divine Liturgy of Saints Addai and Mari and the East Syriac dialect as its liturgical language. It is one of two main liturgical rites of Syriac Christianity, the other being the West Syriac Rite (Syro-Antiochene Rite). The East Syriac Rite originated in Edessa, Mesopotamia, and was historically used in the Church of the East, the largest branch of Christianity which operated primarily east of the Roman Empire, with pockets of adherents as far as South India, Central and Inner Asia and strongest in the Sasanian (Persian) Empire. The Church of the East traces its origins to the 1st century when Saint Thomas the Apostle and his disciples, Saint Addai and Saint Mari, brought the faith to ancient Mesopotamia, now modern Iraq, the eastern parts of Syria, southeastern Turkey, and regions along the Turkish–Syrian and Iran–Iraq borders. According to traditional accounts, Thomas the Apostle is believed to have traveled as far as the Malabar coast, the south-western coast of India. This account is not yet confirmed, and the earliest recorded organised Christian presence in India dates to the 4th century, when Persian missionaries of the East Syriac Rite tradition, members of what later became the Church of the East, established themselves in modern-day Kerala. The East Syriac rite remains in use in churches descended from the Church of the East, namely the Assyrian Church of the East of Iraq (including its archdiocese the Chaldean Syrian Church of India) and the Ancient Church of the East, as well as in two Eastern Catholic churches, the Chaldean Catholic Church of Iraq and the Syro-Malabar Church of India, which are both now in full communion with the See of Rome. The words of Institution are missing in the original version of the Liturgy of Saints Addai and Mari.