The version must have been made early, evidently before the schism occasioned by the Council of Chalcedon, before the influence of Constantinople had begun.
No doubt as soon as Christian communities arose in the rural areas of Roman Syria, the prayers which in the cities (Antioch, Jerusalem, etc.)
As long as all Western Syria was one communion, the country dioceses followed the rite of the patriarch at Antioch, only changing the language.
This point is important because the Syriac Liturgy (in its fundamental form) already contains all the changes brought to Antioch from Jerusalem.
The fact that both the Syriac and the Byzantine Orthodox Churches have the Jerusalem-Antiochene Liturgy is the chief proof that this had supplanted the older Antiochene use before the schism of the 5th century.
Its scheme and most of its prayers correspond to those of the Greek St. James; but it has amplifications and omissions such as is found in all local forms of early rites.
The chronicle of a Syriac prelate, Patriarch Michael the Great, (d. 1199) discusses the question and supplies valuable contemporary documents.
[1] The oldest West Syriac liturgy extant is the one ascribed, as in its Greek form, to Saint James, "the brother of the Lord".
[1] To the Ordo communis, the Syriac Church has added a very great number of alternative Anaphoras, many of which have not been published.
Many anaphoras are obviously quite late, inflated with long prayers and rhetorical, expressions, many contain miaphysite ideas, some are insufficient at the consecration so as to be invalid.
Baumstark (Die Messe im Morgenland, 44–46) thinks the Anaphora of St Ignatius most important, as containing parts of the old pure Antiochene Rite.
He considers that many attributions to later miaphysite authors may be correct, that the Liturgy of Ignatius of Antioch (Joseph Ibn Wahib; d. 1304) is the latest.
It follows in its main lines the older form of Antioch, observed also by the Church of the East, which is the basis of the Byzantine Calendar.
The Divine Office consists of Vespers, Compline, Nocturns, Lauds, Terce, Sext, and None, or rather of hours that correspond to these among Latins.
Out of the mass of anaphoras they chose those believed to be the oldest and purest, leaving out the long series of later ones that they regarded as unorthodox, or even invalid.
In the seven kept for Syriac Catholic use what alterations have been made are chiefly the omission of redundant prayers, and the simplication of confused parts in which the Diaconicum and the Euchologion had become mixed together.
Following the schism in 1665, one of the two factions that emerged (the Puthenkoor) made contact with the Syriac Orthodox Church through Archbishop Gregorios Abdal Jaleel.