Quote Originally Posted by Jeeqbit View Post
The way I always saw it, we had 7 hells because we had 7 shards. Because of the 14 shards, 7 had calamities and no longer exist. The one which presides over all would thus be the source.

The way I also see it, is that Pandaemonium is meant to be the hell, hence why they went as far as having us enter it via the Aetherial Sea near the Atiascope.

In there, we of course fought many bosses.
I felt like in Endwalker, Pandaemonium was a horrible experiment that went bad. The ancients had captured and caged different monsters from different worlds, and Athena was trying to achieve godhood. So, I felt that it really did not cover the Realms of Hell or even the origins of Diablo. If that was indeed the intention of the developers, it leaves open a lot of questions...like where did these hellish monsters come from?