Aurbis

In Elder Scrolls lore, Aurbis is the name for the universe. It includes the Void, Mundus, Oblivion, and Aetherius. It is the overlap of the two cosmic forces: Anu and Padomay. It's extremities in all directions is believed to be Aetherius, home to the Magne Ge and the Dreemsleeve. More to the inside of Aurbis is the void and its planes of Oblivion. The center of Aurbis is Mundus, the mortal plane, and the center of Mundus is Nirn.