The official religion of the Known Universe or the Corrino Empire was the belief system based on the Orange Catholic Bible, basically a concordance of the most important religions of the Old Empire which mainly contained elements from Navachristianity,Buddislam,Mahayana Christianity,Zensunni catholicism and the Maometh Saari religion.This religious beliefs were also known as the "Koranjiyana Zenchristianity" or "Zenchristian Navislam".It's adherents also refered to themselves as "the followers of the fourteen sages".Their concept of God was a male-female-neuter trinity accepted as Supreme Being also interpreted as Buddallah or the Greatmother, the horned goddess and feminine principle of space.

There however does not seem to have been one single united orange catholic church, rather the different religious groups seem to have coexisted among the roof of orange catholic Ecumenism.There also still existed minority groups of pre-orange catholic religions such as Judaism, as far as they were tolerated by or could hide from orange catholic orthodoxy.

The central teachings of orange catholicism were centered about the accord of Logic, reason,Galactophasic determinism and the doctrine of the Butlerian Jihad that "Man may not be replaced" and the ban of all Thinking Machines.Part of the power of the Padishah Emperor was that he guaranteed peace and safety throughout the empire and defended the orange catholic principles.The empire's ruling class itself however, including the Spacing Guild, was agnostic.

Fremen Religion

Fremen Religion was largely based on the Religion of the Wandering Zensunni, but had abandoned almost all traces of it's originally pacifist teachings, though they had preserved the Book of Kreos and still refered to Zensunni Philosophers such as Bu Ji.Fremen religion believed in surviving, fighting, strength and Istislah as well as several Kiswas such as the Bakka, the ruh-spirit, the Qadis as-Salaf and the Sadu.Fremen religion also differed from traditional Zensunnism through several folk-beliefs such as the reverence of the Sandworm of Arrakis (Shai-Hulud who could also appear as Shaitan) as the Demiurge and the impact of the spice orgies.Fremen saw the origin of their Ilm and Shari-a in the Fiqh and much of it was handed down in the Kitab Al-Ibar.According to it ritual was obliged to begin with the words "Ibn Qirtauba".

Fremen Religion had also been deeply manipulated by the Bene Gesserit through the Missionaria Protectiva and there is evidence that the first Sayyadinas of the fremen had been rogue Reverend Mothers.Through this the Fremen-belief in a Mahdi, the Lisan al Gaib, had been strenghtened.

After the rise of Muad'Dib, Fremen religion evolved into the Church of Muad'Dib and turned to agressively converting and spreading it's beliefs and became the dominant religion throughout the Atreides Empire until Leto Atreides II ultimately replaced it with the cult of the God-Emperor.After Leto's death some splintergroups such as the Fish Speakers, the Rakian Priesthood and variants of the Cult of Alia survived.

Sardaukar Religion

Little about the beliefs of the Sardaukar was known to outsiders, but they were widely believed to follow a way of Warrior-mysticism.As Salusa Secundus had been a station of the Wandering Zensunni's misr, it likely had a zensunnitic influence.The Dune Encyclopedia mentions the Tawrah Collegiate and the Torah and Talmudic Zabur of Salusa secundus so influences from Judaism also seem possible.It was widely acknowledged that the Sardaukar envisioned themselves as elite and superior beings.

The High Priest of Dur seems to have been a religious figure traditionally in charge with coronation ceremonies and weddings of House Corrino, it is unknown if this figure also was in other ways directly related to the religious beliefs of the imperial house and the Sardaukar.

The Bene Gesserit Way

The Bene Gesserit universally exploited the religious beliefs of humanity for their cause via the Missionaria Protectiva, were in one form or another seemingly active in the creation of orange catholicism, and held a body of quasi-religious principles and teachings, such as those preserved in the Azhar Book.Though their origins might have been rooted in a pre-butlerian society or matriarchic cult and possibly some kind of goddess religion (such as practiced by the Priestesses of Jowf), the sisterhood, while officially posing as a pious Order of female scholars, Truthsayers and counselors raising well-educated women and training consorts, was through the Reverend Mothers access to the Other Memory in itself largely agnostic and referred to gods as "the gods of our own making".Their Arcana's prime concern were actually politics, and while they used religious language and teachings as a cover they really pursued the Grail, the evolution of humanity and ordering of the Universe (if only under their wise and noble tutelage) via their Breeding program and for this sought to produce the Kwisatz Haderach.

Other religions or religious groups mentioned

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