The purpose of Medieval Mod

I'm puzzled about the meaning of 'medieval' word in this mod. Does it refer to the time period before modern era as my dictionary refers? If so, is the purpose of 'Medieval Mod' just to make that time period more realistic and better?

I have seized playing CTP2 because of no-competent AI. I'm hoping that mod makers can make AI smarter. Not only for medieval time but for the whole time span from ancient to genetic (?) era.

[WesW]

When I first started mod-making for Ctp1, my purpose was to improve the part of the game which covered the years of the Medieval period in Europe. Since then, the purpose of the mod has grown to encompass the entire game.

Wes, thanks for your explanation. I was actually guessing that this might be the reason but now I got the confirmation I wanted!