I really love the “architectural game” concept! Tell me more: is it a map game with a special focus on buildings and architectural elements, or is it something different?
Regarding your question, I think the most fascinating city is Ersilia, where the inhabitants stretch threads to represent the relationships that exist within the city. It’s no coincidence that the city was one of the inspiration for The Littlest Village, a LARP scenario (written in collaboration with other authors) in Crescendo Giocoso Ritornello, currently on Kickstarter: https://www.kickstarter.com/projects/nessundove/crescendo-giocoso-ritornello