Projects

City Projects are produced directly by a city, using its civics output per year. Projects are located within the city center tile and affect the overall yields of the city (in contrast to Improvements, which are built by Worker units on the map). The effects of completing a project may vary depending on nation and Archetypes of the Leader & Governor of the city. Most projects have stronger variants for every cultural level. Some projects are freely repeatable, others are permanent and cannot be produced again in the same city until it reaches the next cultural level.

Permanent projects

Permanent projects can only be done once. When a city reaches the next cultural level, it may produce the stronger variant of the project, replacing the effects of the previous one (i.e., when completing Treasury II a city gains a net of +10 per year).

Treasury

Treasury projects are mainly used to increase the city's money output. If playing as Babylonia, every treasury project also provides +2 per year in the city. If adopted Professional Army law, every treasury project also provides +2 per year.

Name	Requirements	Construction cost	Resources cost	Effects
Treasury I	Administration technology	40 civics	20 stone	+100 on completion +10 per year
Treasury II	Treasury I Developing culture	60 civics	40 stone	+150 on completion +20 per year
Treasury III	Treasury II Strong culture	100 civics	60 stone	+250 on completion +40 per year
Treasury IV	Treasury III Legendary culture	160 civics	80 stone	+400 on completion +80 per year -1 No Icon Found per year

Forum

Forum projects are mainly used to increase the city's civics output. If built The Acropolis wonder, every forum project also provides +0.5 per year in the city. If adopted Philosophy law, every forum project also provides +1 per year.

Name	Requirements	Construction cost	Resources cost	Effects
Forum I	Rhetoric technology	40 civics	20 stone	+20 on completion +1 per year
Forum II	Forum I Developing culture	60 civics	40 stone	+30 on completion +2 per year
Forum III	Forum II Strong culture	100 civics	60 stone	+50 on completion +4 per year
Forum IV	Forum III Legendary culture	160 civics	80 stone	+80 on completion +8 per year -1 No Icon Found per year

Archive

Archive projects are mainly used to increase the city's science output. If the city has a Scholar governor, every Archive project also provides -1 No Icon Found per year in the city. If adopted Gnosticism Theology, every Archive project also provides +2 per year.

Name	Requirements	Construction cost	Resources cost	Effects
Archive I	Metaphysics technology	40 civics	20 stone	+10 on completion +1 per year
Archive II	Archive I Developing culture	60 civics	40 stone	+15 on completion +2 per year
Archive III	Archive II Strong culture	100 civics	60 stone	+25 on completion +4 per year
Archive IV	Archive III Legendary culture	160 civics	80 stone	+40 on completion +8 per year -1 No Icon Found per year

Infrastructure Projects

Infrastructure projects are mainly used to increase the city's defence. For every completed project, the city center gains +10 maximum HP and -1No Icon Found per year, if a Military unit of the same family is inside the city's borders.

Name	Requirements	Construction cost	Resources cost	Effects
Walls	Polis technology	60 civics	40 stone
Moat	Portcullis technology Walls	80 civics	60 stone
Towers	Martial Code technology Moat	100 civics	80 stone	+25% City Defense +1 maximum Range for ranged units

Other Permanent Projects

Some unique projects cannot be enabled through the technology tree, but rather through certain Events.