RETCON NOTE: This posts supersedes portions of "Planes of Monvesia: The Six Spheres" and "Planar Inhabitants of Monvesia."The "outer planes" of Monvesian cosmology are finite, independent demi-planes that exist within one of the other planes created by the overlapping of the Spheres. This is similar to the way that the Abyss and Astral Domains exist within the plans of 4th Edition cosmology. These planes are called Dominions. Two sets of these planes will be explored here: the Thrones and the Powers. Collectively, these are the Greater Dominions
Thrones
At the hear of each Sphere, a vast city can be found, housing the aeon of that Sphere. The city sxits simultaneously in that Sphere's Elemental Plane as well as each adjacent Cosmic March. It is from these aeons that the angels originate, and it is through the angels that that will of the aeon is communicated and/or enacted. While the aeons are the supreme governors of the Spheres, dominion over individual planes is exercised by the most powerful inhabitants of those planes.
There are six Thrones, one for each Sphere. Each is inhabited by that that Sphere's aeon and a majority of its saints. Some archsaints may have dominions of their own elsewhere.