Building of the Ancient Era Production Cost 80 File:Civ6Production.png Faith Cost File:Civ6Faith.png Gold Cost File:Civ6Gold.png Maintenance 0 File:Civ6Gold.png Technology Image:Masonry (Civ6).png Masonry District Image:City Center (Civ6).png City Center Required infrastructure Effect Provides Walls around the City Center and Encampment districts that allow Ranged Strikes from their location. Must be defeated before a city can be assaulted. +50 Outer Defense Strength