The Great Structure was the indoctrination system by which Nazzar rose in religious rank to become praefects, or priests, of the Ulizra religion.
It was originally instituted by Ikree, a princess of Nazzri, after she overthrew her father, Prrit Qabaq, a follower of the dark side. 6 months into her reign, she was murdered, and her teachings were gradually corrupted into the basis of a theocratic dictatorship.
In c.4000 BBY the Structure consisted of 14 vens, associated with distinct sects, one for each month of the Nazzri year. Students mastered each ven in turn, becoming praefects after the 14th ven.