Liturgy of St James

The Liturgy of Saint James or Jacobite Liturgy is the oldest complete form of the Eastern varieties of the Divine Liturgy still in use among certain Christian Churches.

It is based on the traditions of the ancient rite of the Early Christian Church of Jerusalem, as the Mystagogic Catecheses of St Cyril of Jerusalem imply. Forming the historical basis of the Liturgy of Antioch, it is still the principal liturgy of the Syriac Orthodox Church, Malankara Orthodox Syrian Church, Malankara Jacobite Syrian Church, Marthoma Syrian Church, Syrian Catholic Church, Syro-Malankara Catholic Church, Maronite Church. It is also occasionally used in the Eastern Orthodox Church and Melkite Catholic Church.

The Liturgy is associated with the name of James the Just, the "brother" of Jesus and patriarch among the Jewish Christians at Jerusalem. Saint James was martyred at the hands of a mob incensed at his preaching about Jesus and his "transgression of the Law" - an accusation made by the Jewish High Priest of the time, Hanan ben Hanan.

...
Wikipedia