It has been pointed out that King’s Landing is a good location for a capitol because it’s, roughly, at the center of the continent. Yet, before the Conquest, Dorne was ruled from a castle way to the east of the region. Casterly Rock and Storm’s End aren’t centrally located, either. My question: In medieval times and ASOIAF, was it better for a capitol to be located at the center of a region, or to be a port city and more economically successful?