For the first time in history, the rituals of the Priory of Sion are printed and published. This decision has been made after the historical ritual reform begun in 2017 (comparable in substance to that of the United Grand Lodge of England - U.G.L.E. - in 1717); reform that resulted in the possibility of developing a new unified rite as well as the recognition and investiture by acclamation of the current Nautonnier.

The current ritual-body, which uses ritual elements and formulas dating back to the merovingian era, to reach more recent times, receiving influences from different Knightly Orders, as well as Templars, up to modern Freemasonry (post 1717), goes to constitute the philosophical, spiritual and initiatory system which consists in the current legacy of the Priory of Sion. The purpose of this Initiation is the realization of being through three pivotal steps, Christian-Merovingian Initiation, Chivalrous Initiation (attainment of the Little Mysteries and manifestation of the fruit of the teachings), Sacerdotal Initiation (Great Mysteries, contemplation of one's achieved state of accomplishment). This initiatory system therefore carries out the function of making aware and realizing those psychological, cultural, moral and cognitive attributes, characteristic and distinctive of the original Knights who founded the Order.