Building of the Classical Era Production Cost 105 File:Civ6Production.png Faith Cost File:Civ6Faith.png Gold Cost File:Civ6Gold.png Maintenance File:Civ6Gold.png Technology Image:Celestial Navigation (Civ6).png Celestial Navigation District Image:Harbor (Civ6).png Harbor Required infrastructure Effect +25% combat experience for all naval units trained in this city. +1 File:Civ6Food.png Food +1 File:Civ6Gold.png Gold +1 File:Housing6.png Housing +1 File:Citizen6.png Citizen slot +1 Image:Admiral6.png Great Admiral point per turn