I meant like there is Cathedral in game, right? Level 6 government building. Is it possible just to add this one building to represent those landmarks without giving the 5 preceding it? But the problem here is that when you capture a province all the buildings get ruined, aren't they?
The country modifier sounds fine as well. It will be like holding Rome or Mecca, right? But if one country gets many such-like provinces, the pannel with country modifiers if going to get crowded.