Building of the Medieval Era Production Cost 175 File:Civ6Production.png Faith Cost File:Civ6Faith.png Gold Cost File:Civ6Gold.png Maintenance 1 File:Civ6Gold.png Technology Image:Apprenticeship (Civ6).png Apprenticeship District Image:Industrial Zone (Civ6).png Industrial Zone Required infrastructure Effect +2 File:Civ6Production.png Production +1 File:Citizen6.png Citizen slot +1 Image:Engineer6.png Great Engineer point per turn