A number of religions freely operate within the Roman Empire. Some religions have institutions that unite their followers and enforce ideological orthodoxy, such as the Roman Church for Christians or the Order of Olympus for Dodekatheists, but others have multiple competing sects or no institutions whatsoever. Here is a list of the major religious traditions followed in the Roman Republic:
- Christianity: Before magic entered the world, most Romans followed the Christian Church, whose henotheistic stance recognized the supremacy of one God but recognized a pantheon of other gods as divine servants. With the arrival of magic, Christian priests are only one of many clerics who exercise divine magic and the status of other gods has changed to reflect a recognition of the seemingly equal power of Christian priests and the priests of the supposedly lesser gods.
- Genius Populi Romani: Worship of Roman institutions and the guiding spirit of the emperor is not distinct from the core Roman religion but has taken on a new role with the presence of magic, as the oracular traditions of the Old Roman religion returned, keeping their secular, institutional form. In this way, the Haruspices have become the foremost seers in the Republic and can be found in most major cities.
- Dodekatheism: With the path opened by the return of Roman traditions, the Old Greek faith in the Pantheon and other lesser gods has acquired a renewed spirt, with a focus on ancient sites and the sanctity of Mount Olympus. A new council of high priests guides the faithful, making use of a vast wealth of funds provided by wealthy Greek families. Dodekatheists are one of the most open religions to new membership, granting it a rapid growth in the last 50 years.
- Maatanism: Followers of the Old Egyptian faith are closely aligned with the Roman state, with a focus on the ancient concept of Maat (Order) and the cycle of nature. The gods of this religion have also acquired an important role within this framework as what was originally a political ideology grew into a proper polytheistic religion. Worshipers focus their devotion toward particular temples to particular gods, with (ironically) no overarching hierarchy.
- Faith of the Allfather: Devoted to Odin and his children, including Baldr, Thor, and Loki, the Norse faith is one of the larger religions outside Rome but is strongly at odds with the Roman state and only receives token acceptance within the Republic.
- Wodanism: A loose religious order composed of parishes spread throughout the successor states to the Germanic Confederation. Followers are devoted to the gods of the Old Germanic Faith and see kinship with the Norse gods of similar names.
- Zoroastrianism: Soon after magic became known in the world, many Persians took up the old ways of the Magi, finding that these traditions provided incomparable magic for its lead priests. Islamic traditions within the Sarranid Persian Empire are now disappearing entirely as the Magi and their followers return the land of Eran to the worship of Ahura Mazda in the eternal struggle between good and evil.