The Imperial church was the backbone of the Holy Empire that governed the world, and the various dynasties of semi-divine God emperors who ruled it for more than two millennia. Justice was primarily under the authority of the church (along with education). The religion is polytheistic, with over a thousand named deities (every human settlement has a patron God or goddess, and every significant city is a center of cult power represented by a holy ziggurat). There are seven to nine Anunnaki who are the most significant of the Imperial pantheon, these are the judges who determine your fate in the underworld when you die. Clerics aren’t priests of specific deities; they are priests of the Anunnaki. Paladins, however, are dedicated to one of two specific deities among the Anunnaki.
The Holy Empire fell within the lifetime of its oldest remaining citizens, at the spears of the Chaos Hordes of Attila (including the continental forces of the Saexa cavalry). That was the terrestrial authority of the god-king, though. Imperial legions, imperial trade, imperial taxes, imperial governors.
The Imperial church, with its shrines, temples, and basilica still remains in the furthest flung colonies of the Empire (in places such as Albion) however. And where they retain spiritual authority, they maintain a tight grip on the administration of justice. And education.
The church itself has an alignment “of Law”, which for the most part is synonymous with the Lawful alignment among the races of mankind.
Religious practice venerates the Anunnaki specifically, the local patron deity exceptionally, the Mesopotamian pantheon generally, the spirits of the departed from local families (who can afford the keep up the tithe) opportunistically, and the purity of the four elements fundamentally (with a persistent but unspoken bias towards fire).