
Originally Posted by
Tacitursa
Yeah some higher tier buildings require certain resources. The region with the resources in also effects the settlements, such as barbarian (grain) gives 40% income from agricultural so you want to build all your agricultural buildings in (Grain) settlements.
Glass provides research rate, Wine provides bonus experience to units recruited, leather reduces cost of light units etc
Check out the minor settlements list in the wiki and mouse other all of the settlements to see all of the effects.