Chronia is located in an unlocatable part of the Astral Sea, and can only be reached via specific gates or portal. The city of Automata has one such gate.
The main inhabitants of Chronia are the modrons and the servants they have created known as inevitables. The realm is ruled by Primus, the one and only.
Modrons are the keepers of the plane, the maintainers of the cogs and gears.