I want to write a campaign where magic is totally absent using an existing setting—like an existing area where magic is strictly forbidden by authorities or an existing dead magic zone.
For the purposes of this campaign I don't want to create my own world or my own setting in an existing world.
If possible, I would like an area that is as medievally-realistic as possible. Like, not the city of Sigil or a desert area with dead magic or a no-magic plane.
The ultimate goal is to make a campaign that would seem medievally-realistic hence the need to have no apparent magic possible.
Are there areas in Forgotten Realms, Greyhawk, Dragonlance or other wizard official worlds that would work for this? What areas are there where magic is forbidden or "dead"? Im open to areas in Pathfinder as well, but don't want to go too far off official paizo or official wizard of the coast.
If the area has no non-humans it's best, but I can do with them as well.
Forbidden is cool too, because if any magic is considered heresy, it still feels kind of historical.