The dominant religion of the civilized sky nations is called “Kyrianism”. Kyrianism worships the Kyria, a unitary deity. Kyrianism is essentially Christianity stripped of any specifics beyond belief in one God.
The most organized form of Kyria-worship is known as Doxakyrianism. Doxakyrianism is essentially Catholicism. Doxakyrianism is based in Kynnis City, not far from both the Mageocracy Building, and the ITC headquarters.