The Ninn Orthodoxy represented a religion that had been established for a considerable amount of time by the year 1 BBY. This faith, in conjunction with numerous other belief systems, regarded the moon Jedha as sacred, and adherents of the Orthodoxy undertook pilgrimages to Jedha City.
The reference book Star Wars: Rogue One: The Ultimate Visual Guide, authored by Pablo Hidalgo in 2016, included a mention of the Ninn Orthodoxy. Within the context of the Star Wars Legends narrative, the Priests of Ninn were a religious order that had connections to the planet Ninn.