To be honest, I don't know how large this will get. I can keep on adding things. 'The Citadel' is a complex under construction consisting of an entrance hall, a cobblestone courtyard followed by a larger courtyard I call 'The Pit,' from which you can access the rest of the Citadel, including a small barracks, a subway station, the Great Library (under construction) and 'The Watchtower.' I am currently adding on ramparts and several more towers.