wanted to make an indoor, air-conditioned version of European pedestrian areas. Residences, schools, libraries, hospitals, parks, etc.

Coincidentally, there are malls in Asia that actually meet some of those requirements. Big indoor malls with residential condos attached to them, a park on the mall rooftop, clinics and health services inside the mall, hardware store, bookstore where you can read inside, gym, etc.; plus the standard mall stuff (cinema, restaurants, spa, etc.)