Which of the provinces of Tamriel has the most developed Lore? (One that has not been portrayed thoroughly in a game (i.e. parts of Morrowind, Cyrodiil, Skyrim).

I would say Morrowind, even though it is in Vvardenfell rather than the whole province. Loads of stuff to read up on ingame AFAIK.

I wouldn't presume to guess. Each has a fair amount of culture and history behind it.

That'd be Cyrodiil,

HI-YO!

Morrowind by a country mile. The history, culture and people of Morrowind have been explored in far more depth than what we've got regarding anyone else. Though we also know a lot about Southern High Rock and northern Hammerfell from TES II: Daggerfall. Skyrim and Cyrodiil come somewhere after that; we have a lot of ancient history from both. Could argue long and hard which we know better (retcons in mind!).

I see what you did there. lol

/thread.

It's a tossup between Morrowind and Skyrim, with Hammerfell third. Morrowind seems like it's more developed because it's lore is more unique than Skyrim's, and makes us pay attention. When you look at it, though, we know relatively little, especially about the thousand-some years between the War of the First Council and the Nerevarine's arrival.

I'd say it's also the fact that you can join the Great Houses that makes it feel more developed, simply because the existence of political guilds makes it feel more active.

It's why I dislike how you can become a Thane in every Hold.

Am I the only person who read the part about not being explored in-game?

seems that way lol

Well, that would bring it down to Elsweyr, Valenwood, Alinor, and Argonia. Out of those... (to use a bit of a cheatish answer) I would say none of the above, frankly. That was the whole point of "A Dance in Fire" and the "Argonian Account": delving into areas that we know little to nothing about, outside of the Pocket Guides.

[EDIT: Ahh hell, due to the influx of literature on the Thalmor, I'll pitch Summerset.]