Buildings

A building is an immovable object located on a tile. There are three main categories of buildings: resource buildings, monuments, and temples. Other buildings include bridges, roads, and the Embassy. Buildings are constructed by the player. Each type of building can only be built on specific terrain types.

Resource Buildings

Image	Name	Description	Terrain	Unlocked by	Cost (stars)
	Farm	Produces two population.	Field with crop	Farming	5
	Forge	Produces two population for each adjacent Mine.	Field	Smithery	5
	Lumber Hut	Produces one population.	Forest	Forestry	3
	Market	Produces 2 stars each turn for each adjacent Sawmill, Windmill or Forge.	Field (must be built adjacent to a Sawmill, Windmill, or Forge)	Trade	5
	Mine	Produces two population.	Mountain with metal	Mining	5
	Port	Produces one population, turns land units into Rafts, and forms city connections.	Water, flooded field	Sailing	7
	Sawmill	Produces one population for each adjacent Lumber Hut.	Field	Mathematics	5
	Windmill	Produces one population for each adjacent Farm.	Field	Construction	5

Monuments

A monument is a building awarded for completing a task. Each monument produces 3 population and is worth 400 points. Monuments can be built on field and shallow water terrain.

Image	Name	Task	Unlocked by
	Altar of Peace	Pacifst: Make no attacks for five turns.	Meditation
	Emperor's Tomb	Wealth: Gather 100 stars.	Trade
	Eye of God	Explorer: Find all lighthouses.	Navigation
	Gate of Power	Killer: Kill 10 enemy units.	Killing an enemy unit
	Grand Bazaar	Trade: Connect five cities to the capital.	Connecting a city
	Park of Fortune	Metropolis: Have a level 5+ city.	Upgrading a city
	Tower of Wisdom	Genius: Research all technology.	Philosophy

Temples

Main article: Temples

Temples produce one population and are initially worth 100 points; their point value increases over time.

Image	Name	Terrain	Unlocked by	Cost (stars)
	Temple	Field	Free Spirit	20
	Forest Temple	Forest	Spiritualism	15
	Mountain Temple	Mountain	Meditation	20
	Water Temple	Shallow water, ocean	Aquatism	20
	Ice Temple	Ice	Polarism	20

Other

Image	Name	Description	Terrain	Unlocked by	Cost (stars)
	Bridge	Decrease movement cost, form city connections and allows land units to cross one tile of water.	Water	Roads	5
	Embassy	Provide income to both the tribe that builds and the tribe that hosts the Embassy.	Other tribes' capitals	Diplomacy	5
	Roads	Decrease movement cost and form city connections.	Field, forest	Roads	3

Special Tribes

Image	Name	Description	Terrain	Unlocked by	Cost (stars)
Aquarion
	Atoll	Produces one population. Connects every city within 3 tiles over water and flooded terrain.	Water, flooded fields	Waterways	5
	Aqua Farm	Produces 2 population.	Water, flooded fields	Aquaculture	5
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	Sanctuary	Produces one star per turn for each adjacent wild animal. Attracts a wild animal to an empty adjacent forest each three turns.	Any land	Forestry	5
Polaris
	Ice Bank	Produces three stars per turn for each 20 frozen tiles in the world.	Field, ice	Trade	20
	Outpost	Produces one population and forms city connections.	Ice	Frostwork	5
Cymanti
	Algae	Units and city connections can travel over it.	Water, ocean	Hydrology	5
	Clathrus	Produces one star per turn for each adjacent Algae. Poisons enemy units that step on it.	Water, ocean	Trade	5
	Fungi	Produces one population per turn for three turns. Poisons enemy units that step on it.	Any land with spores	Farming	5
	Mycelium	Forms city connections within a three-tile radius and heals friendly units that end their turn on or adjacent to it.	Field, forest	Roads	5

Removed

Image	Name	Description	Unlocked by	Cost (stars)
	Customs House	Produced 2 stars per turn for each adjacent Port. Replaced with markets.	Trade	5
	Lantern	Present in beta versions of Polaris. Never released. Function varied over time.	Varied over time	5
	Library	Decreased the cost of researching new technology by 2 stars per adjacent temple.	Philosophy	5