Equestria has always been described as a "Renaissance Medieval" type of universe. But what they're missing for it to be a true Renaissance Medieval world, is a feudal system. With Celestia and Luna at the head of a diarchy, will they be able to remain cooperative? Or will their competitiveness drive not only them apart, but the whole of Equestria as well?

Heavy AU, not many things from the actual show happens in this story. Like, dislike, fav and comment! I like being critiqued. To quote a DeviantArt thing, "Comment before you Fav!"