Aerodrome
Campus
City Center
Diplomatic Quarter
Encampment
Entertainment Complex
Government Plaza
Harbor
Holy Site
Industrial Zone
Neighborhood
Preserve
Theater Square
Water Park
 Trade Routes from this city gain +2
 Trade Routes from this city gain +2  Production; domestic
 Production; domestic  Trade Routes gain +4
 Trade Routes gain +4  Gold. +1
 Gold. +1  Trade Route capacity, if this city does not yet have a Lighthouse building.
 Trade Route capacity, if this city does not yet have a Lighthouse building.Requirements
 Production
 Production Gold
 Gold Trade Routes from this city gain +2
 Trade Routes from this city gain +2  Production; domestic
 Production; domestic  Trade Routes gain +4
 Trade Routes gain +4  Gold. +1
 Gold. +1  Trade Route capacity, if this city does not yet have a Lighthouse building.
 Trade Route capacity, if this city does not yet have a Lighthouse building.Requirements
 Production
 Production Gold
 Gold