Prime Material Plane

The Prime Material Plane contains the entirety of what might be called the natural world. It contains two inhabited worlds: Oenus and Orba and is probably the most populous of all the planes though the hellish host of The Infernum comes in at a close second. Planar topologists have described the Prime Material Plane as a true, non-solid toroid and so considerable effort has been spent in the recent centuries to make determinations about the space contained within the toroid. The City of Doors rests at the centroid of the Prime Material Plane. The Inner Planes all intersect the Prime Material Plane but the Outer Planes do not.