The Liturgy of Saint James is a form of Christian liturgy used by some Eastern Christians of the Byzantine rite and West Syriac Rite. It is the oldest complete form of the Eastern Christian liturgies, and is based on the traditions of the ancient rite of the Church of Jerusalem, as the "Mystagogic Catecheses" of Cyril of Jerusalem imply. Forming the historical basis of the Liturgy of Antioch, it is still the principal liturgy of the Syriac Orthodox Church, the Malankara Orthodox Syrian Church, the Syriac Catholic Church, the Syro-Malankara Catholic Church and the Maronite Church. It is also occasionally used in the Eastern Orthodox Church and Melkite Catholic Church. The Malankara Mar Thoma Syrian Church uses a reformed variant of this liturgy omitting prayers for Intercession to Saints.