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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
Farm Produces two population. Field with crop Farming 5
Forge level 1
Forge Produces two population for each adjacent Mine. Field Smithery 5
Lumber hut
Lumber Hut Produces one population. Forest Forestry 3
Market
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
Mine Produces two population. Mountain with metal Mining 5
Port
Port Produces one population, turns land units into Rafts, and forms city connections. Water, flooded field Sailing 7
Sawmill level 1
Sawmill Produces one population for each adjacent Lumber Hut. Field Mathematics 5
Windmill 1
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
Xin-xi altar of peace
Altar of Peace Pacifst: Make no attacks for five turns. Meditation
Xin-xi emperors tomb
Emperor's Tomb Wealth: Gather 100 stars. Trade
Xin-xi eye of god
Eye of God Explorer: Find all lighthouses. Finding a lighthouse
Xin-xi gate of power
Gate of Power Killer: Kill 10 enemy units. Killing an enemy unit
Xin-xi grand bazaar
Grand Bazaar Trade: Connect five cities to the capital. Connecting a city
Xin-xi park of fortune copy
Park of Fortune Metropolis: Have a level 5+ city. Upgrading a city
Xin-xi tower of wisdom
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 level 5
Temple Field Free Spirit 20
Forest temple level 5
Forest Temple Forest Spiritualism 15
Mountain temple level 5
Mountain Temple Mountain Meditation 20
Water temple level 5
Water Temple Shallow water, ocean Aquatism 20
Ice temple level 5
Ice Temple Ice Polarism 20

Other[]

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

Special Tribes[]

Image Name Description Terrain Unlocked by Cost (stars)
Aquarion
Atoll
Atoll Produces one population. Connects every city within 3 tiles over water and flooded terrain. Water, flooded fields Waterways 5
Aqua Farm
Aqua Farm Produces 2 population. Water, flooded fields Aquaculture 5
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Sanctuary level 2
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 level 2
Ice Bank Produces three stars per turn for each 20 frozen tiles in the world. Field, ice Trade 20
Outpost
Outpost Produces one population and forms city connections. Ice Frostwork 5
Cymanti
Algae
Algae Units and city connections can travel over it. Water, ocean Hydrology 5
Clathrus level 2
Clathrus Produces one star per turn for each adjacent Algae. Poisons enemy units that step on it. Water, ocean Trade 5
Fungi level 2
Fungi Produces one population per turn for three turns. Poisons enemy units that step on it. Any land with spores Farming 5
Mycelium level 2
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 1
Customs House Produced 2 stars per turn for each adjacent Port. Replaced with markets. Trade 5
Old outpost 5
Lantern Present in beta versions of Polaris. Never released. Function varied over time. Varied over time 5
Library 1
Library Decreased the cost of researching new technology by 2 stars per adjacent temple. Philosophy 5
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