The "Rule of the Theotokos" is an Eastern Orthodox and Byzantine Catholic devotion akin to the Western Rosary, featuring 150 Angelic Salutations divided into 15 decades. Each decade reflects on significant events in the life of the Virgin Mary. The prayer employs a Prayer Rope, emphasizing meditation on the mysteries and the intercession of the Theotokos. The text outlines the historical origins, differences from the Western Rosary, method of prayer, and meditations for each mystery. The Rule of the Theotokos invites believers to understand profound theological truths through prayer, enhancing both personal and communal theological literacy within the Byzantine Catholic tradition.