World Disks

The World Disks (Orbēs Mundī) are two roughly disk shaped (though some heretical scholars have described them as "bowls") gravitational locales at the center of the Prime Realm.

They are located in the middle of the Middle Realms and under the Aethereal Realms with the Middle Realms sometimes being conceptualized as simultaneously being overlapping layers that cover the Prime World Disk shaping reality as the people of the Prime World Disk know it.
The Two World Disks are the smaller and lower Under-World and the upper Prime World Disk , the "mundane world" as mortals of all shapes and sizes have known it.
The World Disks collectively rest upon the skull plate of the World Skull under Seven Suns.