The Armenian Apostolic Church is autocephalic, that is, it has its own head and is separate from all other churches. However, this missal in Armenian was published for the use of the celebrant of the liturgy according to the Roman Catholic rite. Because it was published by the Armenian Catholic Mkhitarist Monastery of San Lazzaro and was based on a Roman publication of 1677, the Crucifixion and all the other engravings and decorative devices are stylistically Western.