Might I suggest somewhere we can see buildings that have already been built in village? Also a tooltip mouseover for the building icon when we minimize it to see what it is?
Mostly this is because we open up new blessings and/or red gem or school bonuses to add max cap on buildings but if its a building we've already capped out we no longer see them anymore to confirm if its something we wanna buy.
This is true for horde and mining skills as well. Just someway to see minimally what that skill or building did or how many we've completed perhaps if it won't add clutter?