City Improvements

City Improvements are various additions to your city that are unlocked by research, completing quests, or receiving Blessings. After being built, City Improvements can boost production of resources (Food, Industry, Science, Dust and Influence, also known as FIDSI), improve your approval rating within your city, or a number of other things. Generally, City Improvements must be built within a city for their benefits to be applied, though some - such as the City Hall or Palace - are built automatically upon founding the city.

Unlike Expansions, City Improvements do not occupy any space in the world and are "contained" within the city. A city's built City Improvements can be seen from the City Management Screen by selecting "Browse", and can be destroyed from here if necessary.

City Improvements

Available From Start

City Hall Faction: All Obtained: Starting Improvement Type: City Improvement	Costs: 10 per		For your empire to grow and flourish your cities must be well-organized. This imposing administrative center ensures that finances, defense, and commercial affairs run smoothly.
Effects: +4 per on city +4 per on city +4 per on city +4 per on city +2 per on city +1 Vision on City Center +100 Fortification on city Can be used as resource extractor

Founder's Memorial Faction: All Obtained: Starting Improvement Type: City Improvement	Costs: 60		This one-time construction creates a memorial to your leadership and the founding of your empire. commerce, patriotism, and politics will ensure it grows quickly.
Effects: +2 on city +2 on city +2 on city +2 on city +1 on city Can only be built once in your empire

Palace Faction: All Obtained: Starting Improvement Type: City Improvement	Costs:		It is from this building that you rule your empire. Information, decisions, and money flow to here; it is the nerve center of the management of your lands. It is also, of course, a primary target for enemies.
Effects: +22 on city +50 Fortification on city x0 Expansion disapproval generation on city +1 Max unit slots on militia +1 Trade routes max on city

Era I

Center for Minerology Faction: All except Forgotten Obtained: Era I Type: Unique Building Focus: Science	Costs: 150 4 per		This building, beautifully decorated with marble and crystals, encourages the alchemists of the empire to study and experiment upon the many minerals of Auriga.
Effects: +5 per on city Can only be built once in your empire

Dust Dredger Faction: All Obtained: Era I Type: City Improvement Focus: Dust	Costs: 75		Sifting with sophisticated nets in wells, rivers and floodplains helps isolate this precious magical resource, increasing city Dust production.
Effects: Need an exploited river tile to be built +2 on terrain with river during Summer

Dust Filtration Faction: All Obtained: Era I Type: City Improvement Focus: Dust	Costs: 75		When ice melts and rivers and seas grow warmer in the summer season, a combination of magnetics and very fine filters can be used to harvest Dust directly from the waters.
Effects: Need an exploited lake or sea tile to be built +3 on terrain with sea or lake during summer

Empire Mint Faction: All Obtained: Era I Type: City Improvement Focus: Dust	Costs: 75		A public building dedicated to collecting Dust and minting currency increases the Dust produced.
Effects: +5 on city +15% on city

Geomic Labs Faction: All except Forgotten Obtained: Era I Type: City Improvement Focus: Science	Costs: 75 1 per		This new science, based on the study of the natural rock formations of Auriga, brings a wealth of new knowledge to the city.
Effects: +2 on terrain with science

Husbandry Center Faction: All except Broken Lords Obtained: Era I Type: Unique Building Focus: Food	Costs: 150 4 per		From bees to bison, this center for the study of native animal species accelerates their domestication and greatly improves Food production.
Effects: +5 per on city Can only be built once in your empire

Infantry Cantina Faction: All Obtained: Era I Type: City Improvement Focus: Military	Costs: 75		A watering hole only for enlisted soldiers not only cuts down on drunken brawls between uniform and city, but also promotes the exchanges of battle tactics, weapon handling, and other information, making more experienced fighters.
Effects: +1 max unit slots on militia

Mill Foundry Faction: All Obtained: Era I Type: City Improvement Focus: Industry	Costs: 75 1 per		Improved quality of critical parts for mills increases the amount of Industry produced.
Effects: +6 on city +15% on city

Public Library Faction: All except Forgotten Obtained: Era I Type: City Improvement Focus: Science	Costs: 75 1 per		The first step in improving science is to bring together existing knowledge. This building will help to increase the Science produced.
Effects: +10 on city +10% on city

Seed Storage Faction: All except Broken Lords Obtained: Era I Type: City Improvement Focus: Food	Costs: 75 1 per		Seeds of domesticated plants are stored for sowing, making crops more reliable and increasing the amount of Food produced.
Effects: +10 on city during summer +15% on city

Sewer System Faction: All Obtained: Era I Type: City Improvement Focus: Approval	Costs: 75 1 per		The drop on nauseating odours and infectious diseases, thanks to the new public sanitation system, instantly gives an Approval bonus to your City.
Effects: +20 on city +1 on approval (happy)

Stronghold Architecture Faction: All Obtained: Era I Type: City Improvement Focus: Military	Costs: 75		Basic architectural advances like moats, crenellations, sally ports, etc. greatly improve city defences.
Effects: +2 (+6 with ELCP) Fortification recovery per turn on city +100 Fortification on city +1 XP per turn on army

Faction-Specific

High Towers Faction: Roving Clans Obtained: Faction Quest Type: City Improvement Focus: Science	Costs: 400 -2 per		Expertise obtained from the Wild Walkers in matters of architecture and construction materials boosts Science, and the towers themselves increase Vision range.
Effects: +2 vision on city tiles +5 on city Limited to one copy in your empire Wild Walkers hero with Roads of Dust item equipped must be city governor

Era II

Alchemy Workshop Faction: All except Forgotten Obtained: Era II Type: City Improvement Focus: Science	Costs: 250 5 2 per		Solid buildings are constructed where the curious can mix, match, and ignite various materials. Science advances, in spite of a noticeable increase in minor burns, temporary deafness, and smoky streets.
Effects: +15 on city +20% on city

Apprenticeship Registry Faction: All Obtained: Era II Type: City Improvement Focus: Industry	Costs: 250 5 2 per		By formalizing the process of apprenticeship, young workers can more rapidly learn valuable trade skills, which increases overall Industry within a city.
Effects: +1 on exploitation

Canal Locks Faction: All Obtained: Era II Type: Unique Building Focus: Industry	Costs: 600 5 4 per		Though the engineering and construction is difficult, the creation of a series of locks for shipping improves transfer of goods via the canals, even if they must go uphill.
Effects: +5 per on city Can only be built once in your empire

Canal System Faction: All Obtained: Era II Type: City Improvement Focus: Industry	Costs: 250 2 per		The creation of a network for rapidly transporting goods gives an immediate Industry bonus to your City.
Effects: +1 on terrain with industry during summer

Central Market Faction: All Obtained: Era II Type: City Improvement Focus: Approval	Costs: 250 2 2 per		This great national market brings in goods from across Auriga. New jobs and experiences are created as the population finds new ways to indulge itself.
Effects: +25 on city +10% on approval (fervent) +10% on approval (fervent)

Conscription Center Faction: All Obtained: Era II Type: City Improvement Focus: Military	Costs: 250 2 per		A formal process to find, enlist, and train raw recruits results in a noticeable improvement in troop quality.
Effects: +40 XP when recruiting a unit on units

Defensive Wards Faction: All Obtained: Era II Type: Unique Building Focus: Military	Costs: 600 5 4 per		By dividing the city into a series of wards, with the citizens of each ward responsible for the upkeep and patrolling of the walls, city defense is greatly improved.
Effects: +30 Fortification per on city Can only be built once in your empire

Fish Farm Faction: All except Broken Lords Obtained: Era II Type: City Improvement Focus: Food	Costs: 250 5 2 per		Nets and cages by the shores of lakes and along reefs increase fish yields, raising Food production.
Effects: Need an exploited lake or sea tile to be built +3 on terrain with sea or lake during summer

Glory of Empire Faction: All Obtained: Era II Type: City Improvement Focus: Influence	Costs: 250 3 per		This magnificent public building includes statues, libraries, and frescoes that ell of the founding and growth of your civilization. A source of awe and pride, it increases Influence Points produced by each unit of Population.
Effects: +5 on city +1 per on city

Irrigation Networks Faction: All except Broken Lords Obtained: Era II Type: City Improvement Focus: Food	Costs: 250 5 2 per		Modern materials and machines allow the creation of vast networks of irrigation, making arable land more productive and rendering dry land arable.
Effects: Need an exploited river tile to be built +3 on terrain with river during summer

Lumber Mill Faction: All Obtained: Era II Type: City Improvement Focus: Industry	Costs: 250 5 2 per		Better machines for transforming bucked and limbed logs into cants and flitches increase the amount of Industry produced on forest tiles.
Effects: Need an exploited forest tile to be built +1 on terrain with forest

Negotiation Tactics Faction: All Obtained: Legendary Deed Type: City Improvement Focus: Roads	Costs: 200		You reign supreme in both diplomatic and commercial negotiations. As your Trade Routes rumble with caravans and your embassies murmur with deals, the wealth of your empire grows.
Effects: +50% Trade Route Bonus on City Trade Routes

Public Granary Faction: All except Broken Lords Obtained: Era II Type: City Improvement Focus: Food	Costs: 250 5 2 per		As large quantities of grains can now be stored safely for long periods of time, your city receives an immediate Food bonus.
Effects: +15 on city +2 per on city

Right of Way Faction: All except Morgawr Obtained: Era II Type: City Improvement Focus: Roads	Costs: 250 3 per		Previously paths across private land full of rust and mud, roadbeds are now being constructed for heavy use on lands purchased form their owners.
Effects: Roads are automatically created between cities in adjacent regions (regardless of diplomatic status), one of which having this improvement built Improves the roads into paved roads Used by Trade Routes Grant movement bonus

Faction-Specific

Deep Generator Faction: Vaulters Obtained: Era II Type: City Improvement Focus: Holy Resource	Costs: 250 20		Harnessing the mighty power of the timeless fires of the deep, Vaulter backup generators provide sustainable and reliable energy that is missing on the surface. All resources are boosted.
Effects: +10% on city +10% on city +10% on city +10% on city The cost indicates that the Holy Resource has to be chosen.

Main Maritime Academy Faction: Morgawr Obtained: Faction Quest Type: City Improvement Focus: Military	Costs: 200 5 5 2 per		Casting far and wide for particularly talented Morgawr, this collective turns out armies that are particularly skilled and capable in executing maritime actions.
Effects: +80 XP when recruiting a unit on naval unit Need an exploited sea tile to be built

Oologic Nursery Faction: Drakken Obtained: Faction Quest Type: City Improvement Focus: Food	Costs: 400 10 20 2 per		Gifted with strong social instincts and great knowledge of Endless technology, the Drakken build sophisticated centers for the incubation of their young.
Effects: Requires an income of 20 from the city tiles +10 on city +25 XP when recruiting a unit on units

Tower of the Consecrate Faction: Forgotten Obtained: Faction Quest Type: City Improvement Focus: Exploitation	Costs: 600 2 per		Though the Consecration Order is primarily concerned with the spiritual well-being of the Forgotten, as moral authority they also control and improve the distribution of key, scarce resources from this building.
Effects: Requires at least 1 from pacified villages +1 resource on strategic resource extractor +1 resource on luxury resource extractor

Verda's Temple Faction: Ardent Mages Obtained: Faction Quest Type: City Improvement Focus: Science	Costs: 400 -2 per		The subtleties of Dust are numerous and easy to overlook. Only through its methodical study will its secrets be discovered. This temple, replete with terrifying contraptions, will aid that endeavor.
Effects: +2 on terrain with science Limited to one copy in your empire

Winter Shelters Faction: Vaulters Obtained: Faction Quest Type: City Improvement Focus: Food	Costs: 250 20 -1 per		By resurrecting the dormant, though not forgotten, arts of subterranean architecture and horticulture, the Vaulters can construct shelters to negate the worst effects of winter.
Effects: Winter food reduction immunity Winter approval reduction immunity The cost indicates that the holy resource has to be chosen.

Era III

Advanced Alchemy Lab Faction: All except Forgotten Obtained: Era III Type: City Improvement Focus: Science	Costs: 600 10 4 per		Wise (and brave) researchers study the many strange properties of different matter. Their knowledge increases the amount of Science produced by each unit of Population.
Effects: +3 on city center +3 on district +3 per on city

Bells and Whistles Faction: All Obtained: Era III Type: City Improvement Focus: Fortification	Costs: 600 5 4 per		Simple alarm systems added to industrial and financial structures - and rewards for those who report them - help to alerting the authorities when something nefarious is going on.
Effects: +30 Fortification on Regional Building +4 Fortification Recovery on Regional Building

Caravanserai Faction: All Obtained: Era III Type: City Improvement Focus: Trade Routes	Costs: 600 2 per		A network of walled inns with wells, shops, fodder, and stables greatly increases the security and survivability of caravans.
Effects: +1 Trade routes max on city +50% on city trade routes

Cryometric Monitors Faction: All except Forgotten Obtained: Era III Type: City Improvement Focus: Science	Costs: 1200 15 8 per		Recent scientific improvements allow careful and accurate measurement of temperature fluctuations. Studying this data leads to improved ability to predict the arrival of the next Dark Season.
Effects: -40% Margin of error for season predictability on empire +15 on terrain with anomaly Limited to one copy in your empire

Dust Depository Faction: All Obtained: Era III Type: City Improvement Focus: Dust	Costs: 600 5		A center where inert Dust is traded for currency increase the amount of Dust produced by each unit of Population.
Effects: +4 per on city

Dust Refinery Faction: All Obtained: Era III Type: City Improvement Focus: Dust	Costs: 600 10		Artificers work on inert Dust, imbuing it with unusual powers and increasing the value of Dust produced.
Effects: +20 on city +30% on city

Dust Transmuter Faction: All Obtained: Era III Type: Unique Building Focus: Dust	Costs: 1200 10		A marvel of magic and alchemy, this glowing edifice is magically linked to pylons throughout the city. By exciting existing Dust in the ground, baser elements can, over time, transmute into Dust.
Effects: +10 on terrain with Dust Can only be built once in your empire

Hydromatic Laboratory Faction: All except Forgotten Obtained: Era III Type: City Improvement Focus: Science	Costs: 400 10 4 per		New laboratories can be built that take advantage of a river's current. These provide power for experiments as well as a wealth of information about the river itself.
Effects: +3 on terrain with river

Imperial Kennels Faction: All Obtained: Era III Type: City Improvement Focus: Military	Costs: 600 5 1 per		Packs of hunting dogs trained to pick up the scent of intruders are useful for finding scouts, saboteurs, and patrols. Their mortality rate is high, but they are necessary to help defend your cities.
Effects: +200 Fortification on city +2 XP per turn on army

Inquisitors' Divinity Faction: All Obtained: Era III Type: City Improvement Focus: Security	Costs: 600 5 -6 per		By founding a new Divinity expressly dedicated to unmasking the worms in the pulp of Forgotten society, the ability to find enemy spies is greatly improved.
Effects: +20 security on city

Large-Scale Aquatic Center Faction: All except Forgotten Obtained: Era III Type: City Improvement Focus: Science	Costs: 600 10 4 per		A dedicated facility investigating all things aquatic from lake fish to seabed flora confers an immediate Science bonus for every non-river water tile.
Effects: +3 on terrain with sea or lake +2 per on city

Lava Works Faction: All Obtained: Era III Type: City Improvement Focus: Science	Costs: 600 5 5 4 per		Inspired by ancient watermills, Lava Works harness the natural power of lava flows, and give unique benefits.
Effects: Needs an exploited lava flow tile to be built +8 on lava flow terrain +8 on lava flow terrain

Materials Hoard Faction: All Obtained: Era III Type: City Improvement Focus: Military	Costs: 600 5 1 per		By pre-locating stores of mortar, bricks, lumber, and tools at various points around a city, reconstruction and recovery can be rapidly and easily organized on a local scale.
Effects: +10 (+20 with ELCP) Fortification Recovery per turn on city +100 Fortification on City

Medical Center Faction: All Obtained: Era III Type: City Improvement Focus: Military	Costs: 600 5 2 per		Pulling together the work of herbalists, barbers, and doctors, centers are built for the care of the wounded and the study of improved treatments.
Effects: +10% Health Regen on city +10% Ally Health Regen on city

National Arena Faction: All Obtained: Era III Type: Unique Building Focus: Influence	Costs: 1200 10 8 per		This enormous center of sport, spectacle, and entertainment spreads tales of your civilization's culture and prowess far and wide.
Effects: +50% on city Can only be built once in your empire

National Museum Faction: All Obtained: Era III Type: City Improvement Focus: Influence	Costs: 600 5 5 4 per		The empire holds a great store of loot (though we prefer the term "acquired objects"). This museum puts them on display, provides facilities to study them, and reminds others of the reach and power of your empire.
Effects: +2 on city center +2 on district +2 per on city

Plow Factory Faction: All except Broken Lords Obtained: Era III Type: City Improvement Focus: Food	Costs: 600 10 5 4 per		A revolutionary improvement, curved iron plows, increases the amount of food produced.
Effects: +3 on exploitation

Faction-Specific

Endless Recycling Faction: Vaulters Obtained: Era III Type: City Improvement Focus: Science	Costs: 400 20 -4 per		Clever engineers and nimble fingers combine to get maximum use out of any sort of artifact or scrap coming from the ruins that litter Auriga.
Effects: +14 on city center level 2 +14 on district level 2 The cost indicates that the holy resource has to be chosen.

Fungal Laboratory Faction: Necrophages Obtained: Faction Quest Type: City Improvement Focus: Food	Costs: 400 5 per		Using technology discovered in the ancient ruins of Auriga, Necrophage workers improve the management of air, moisture, and fertilizer to greatly increase the output of their fungal 'farms'.
Effects: Limited to one copy in your empire Ka-Riss hero must be city governor +5 per on city

Koni School of Elite Riders Faction: Kapaku Obtained: Faction Quest Type: Unique Building Focus: Military	Costs: 800 20 6 per		Named after an infamous rider,this massive fortress houses an elite institution for training the Kapaku's most promising operatives. Soldiers trained in this brutal proving ground are infused with combat experience beyond their seeming fresh recruit status.
Effects: +100 Fortification on city +10 (+20 with ELCP) Fortification recovery per turn on city +100 XP when recruiting a unit on units Can only be built once in your empire

Shrine of Whispers Faction: Cultists Obtained: Faction Quest Type: City Improvement Focus: Science	Costs: 800 30 -4 per		Within each newly converted village a specialized shrine is constructed; it sifts prayers, thoughts, and conversations to obtain scientific information from tales and superstition.
Effects: +2% per converted village on cities

Strength of the Vault Faction: Vaulters Obtained: Era III Type: City Improvement Focus: Military	Costs: 250 10 -1 per		The coming together of the Vaulter clans has led to unprecedented cooperation. Bringing together all their knowledge of defensive hexes, spells, tactics, and weapons, city defenses greatly improve.
Effects: +100 fortification on city +5 (+15 with ELCP) fortification recovery per turn on city The cost indicates that the Holy Resource has to be chosen.

Era IV

Army Manual Faction: All Obtained: Era IV Type: Improvement Focus: Military	Costs: 1200 5 7 per		Although it doesn't look pretty, being printed and bound on cheap paper, the distribution of this training guide to all new recruits raises troop quality.
Effects: +100 XP when recruiting a unit on units

Automated Production Faction: All Obtained: Era IV Type: City Improvement Focus: Industry	Costs: 1200 5 15 7 per		Centralized stocks of raw materials, distribution centers, and co-located factories increase Industrial output.
Effects: +3 on terrain with Industry

Benevolent Emperor Faction: All Obtained: Legendary Deed Type: City Improvement Focus: Dust	Costs: 1200		Showing as much interest in your people's health and well-being as in their productivity, your concern pays for itself many times over as they eagerly seek new sources of Dust for you.
Effects: +100% on Approval (Happy)

Fertilizer Plant Faction: All except Broken Lords Obtained: Era IV Type: Improvement Focus: Food	Costs: 1200 15 10 7 per		Chemical and biological fertilizers, applied in industrial quantities to the soil, greatly increase Food production.
Effects: +3 on terrain with Food

Imperial Funding Faction: All except Forgotten Obtained: Era IV Type: City Improvement Focus: Science	Costs: 1200 25 5 7 per		By judiciously doling out money to private concerns or universities, the Empire can speed research in promising new sciences.
Effects: +5 on terrain with Science

Hothouses Faction: All except Broken Lords Obtained: Era IV Type: Improvement Focus: Food	Costs: 1200 15 10 7 per		By building glass roofing over certain fields, crops can be raised in a warm, protected environment that increases agricultural yields.
Effects: +3 on exploitation

Mining Rights Faction: All Obtained: Era IV Type: City Improvement Focus: Industry	Costs: 1200 10 15 7 per		With landholders and private enterprises given the right to buy mining licenses at strategic resource deposit sites, Industry output per site increases.
Effects: +1 Resource on strategic resource extractor

National Craftworks Faction: All Obtained: Era IV Type: Unique Building Focus: Resources	Costs: 2500 15 15 per		To improve and promote luxury goods, the transformation of raw materials into finished products is now handled in this enormous center where technicians, designers, and artisans share ideas.
Effects: Doubles effects of luxury resource boosters on city Can only be built once in your empire

National Military College Faction: All Obtained: Era IV Type: Unique Building Focus: Military	Costs: 2500 15 15 per		This great center of training, storage, and accommodation is linked to the main boulevards and waterways of the city. Integrated into the city's daily life, it vastly improves troop efficiency.
Effects: +100% Attack on units in city Can only be built once in your empire

Production Line Faction: All Obtained: Era IV Type: City Improvement Focus: Industry	Costs: 1200 10 10 7 per		Techniques of mass production increase the amount of Industry produced by each unit of Population.
Effects: +3 per on city

Refrigeration Plant Faction: All except Broken Lords Obtained: Era IV Type: City Improvement Focus: Food	Costs: 1200 15 5 7 per		Food can now be preserved for long periods, increasing the amount of Food produced by each unit of population.
Effects: +3 per on city +25% on city

Subterranean Gardens Faction: All except Broken Lords Obtained: Era IV Type: City Improvement Focus: Food	Costs: 1200 5 15 7 per		Flora and fauna of the planet are adapted to survive in subterranean bioshperes. This is a great advantage in times of winter, drought, or war, and increases the Food that can be produced.
Effects: +10 on district during winter -100% life loss during siege on city

Wyrm Farm Faction: All except Broken Lords Obtained: Era IV Type: City Improvement Focus: Food	Costs: 1200 5 5 7 per		Drawn from unknown depths, volcanic terrain attracts giant, rugged worms that can be farmed for sustenance.
Effects: Needs an exploited volcanic tile to be built +15 on city +2 per on city

Faction-Specific

Altar of Channeling Faction: Broken Lords Obtained: Faction Quest Type: City Improvement Focus: Dust	Costs: 1500		Based on designs and concepts of the Endless - and therefore incomprehensible - these structures, when built, create a chain of holy sites that sense, absorb, and renew Dust.
Effects: +5 per on city +5 on city

Altar of Transcendence Faction: Ardent Mages Obtained: Faction Quest Type: City Improvement Focus: Influence	Costs: 1000 30 / 30 / -7 per		When constructed, this dense slab of some of Auriga's rarest materials hums with Dust energy. Mages strong and brave enough to climb into its recessed contours will transcend or die. Either way they will experience unimaginable pain.
Effects: +5 per on city +10 on city +30 on city Limited to one copy in your empire

Auriga Institute Faction: Drakken Obtained: Faction Quest Type: City Improvement Focus: Approval	Costs: 800 5 4 per		This academic center brings together thinkers and researchers from across the planet. Sages of all nations come together to study the history, trends, and possible futures of Auriga.
Effects: Require an income of 20 from the city +20 on city +10 on approval (fervent)

Givers of Remembrance Faction: Necrophages Obtained: Faction Quest Type: City Improvement Focus: Military	Costs: 1200 10 -5 per		A reduced breed of Givers of Remembrance, Lesser Givers only collect and share battlefield lessons between armies rather than all the histories of the hive.
Effects: +100 XP when recruiting a unit on units

Resource Magnetron Faction: Vaulters Obtained: Faction Quest Type: City Improvement Focus: Holy Resource	Costs: 1200 60 -4 per		This discovery uses alchemical principles of attraction between different nodes of identical resources. It can be used to leech any resource from the air and ground, given the right materials and enough energy.
Effects: +10 Holy Resource on city Limited to one copy in your empire The cost indicates that the Holy Resource has to be chosen.

The Ogmakwan Faction: Wild Walkers Obtained: Faction Quest Type: City Improvement Focus: Approval	Costs: 5000 -10 per		Strong as the structures of the Endless, with roots that reach deep into Auriga's crust and towers of impossible height, Zaltana's Ogmakwan is many things. Built from an enormous range of materials and assembled using physical principles no one else comprehends, Zaltana's great edifice will forever change the way structures are raised. It will also, with luck, help the Wild Walkers to survive the great Last Winter.
Effects: +80 approval on city Limited to one copy in your empire

Well of Dust Faction: Roving Clans Obtained: Faction Quest Type: City Improvement Focus: Trade Routes	Costs: 1000 -2 per		Part magical and part mercantile, this partially submerged treasury accumulates Dust from whatever source is available. Ruins, ancient mechanisms, markets, caravans, and even the air all contribute something to this storehouse of wealth and magic.
Effects: Requires Right of Way built in the city Requires an income of 100 from the city +2 Trade Routes max on city

Era V

Advanced Extraction Faction: All Obtained: Era V Type: City Improvement Focus: Industry	Costs: 2000 40 7 per		General improvements in alchemy, metallurgy, and conservation lead to far greater efficiencies in the extraction of Luxury Resources.
Effects: +4 Resource on Luxury Resource Extractor

Advanced Quarry Faction: All Obtained: Era V Type: City Improvement Focus: Industry	Costs: 3000 10 20 10 per		Better methods for mining, cutting and forging metals and minerals result in greater productivity and less waste, increasing the productivity of Strategic Resource sites.
Effects: +50 on terrain with strategic resource Limited to one copy in your empire

Arena of Champions Faction: All Obtained: Era V Type: City Improvement Focus: Influence	Costs: 3000 10 10 20 per		Construction of a massive sporting complex in your city draws praise, spectators, and money from far across Auriga. Your empire's Influence increases noticably.
Effects: +100% on city Limited to one copy in your empire

Arts Council Faction: All Obtained: Era V Type: City Improvement Focus: Approval	Costs: 2000 10 5 10 per		The central funding of a dedicated arts committee leads to a flourishing of cultural enterprises. Sculptures, open-air performances, and jamborees throng the city, increasing the population's well-being.
Effects: +30 on city +10% on approval (fervent) +10% on approval (fervent)

Aura of Empire Faction: All Obtained: Era V Type: City Improvement Focus: Influence	Costs: 2000 10 10 10 per		As each district grows it gains impressive public buildings and parks. All of this increases the fame and reputation of the city and the empire, growing civic pride and generating awe in the minds of visitors.
Effects: +15 on district level 2 +4 per on city

Climatology Guild Faction: All except Forgotten Obtained: Era V Type: City Improvement Focus: Science	Costs: 3000 30 10 20 per		The intensity of the Dark Season weather has driven engineers, scientists, and alchemists to pool their skills in a common center where they study the origins and effects of the Auriga winter.
Effects: -40% margin of error for season predictability on empire +15 on district level 2 Limited to one copy in your empire

Customs Ministry Faction: All Obtained: Era V Type: Unique Building Focus: Trade Routes	Costs: 4000 20 40 per		In a grand building that replaces run-down offices and shanties, taxes and administrative details for trade and transport are rapidly and efficiently dealt with. Trade capacity takes an enormous jump.
Effects: +7 Trade routes max on city Can only be built once in your empire

Dust Revitalizer Faction: All Obtained: Era V Type: City Improvement Focus: Dust	Costs: 2000 30 5		New methods and alchemies for extracting Dust are particularly useful where it has already been found, as Dust that is supposedly dormant can be infused with power.
Effects: +5 on terrain with Dust

Imperial News Network Faction: All Obtained: Era V Type: City Improvement Focus: Approval	Costs: 2000 5 10 10 per		Rather than rely on rumor and graffiti to convey news, a national service is created to ensure the population has all the information they need to be happy.
Effects: +20 on city +2 per on approval (happy) +2 per on approval (happy) +2 per on approval (happy) +2 per on approval (happy) +1 per on approval (happy)

Inoculation Station Faction: All Obtained: Era V Type: City Improvement Focus: Military	Costs: 2000 15 5 5 per		Injections to bolster the bodies natural defenses means that recovery times for nasty injuries or diseases are greatly reduced, whether they happen on the battlefield, in the latrine, or in a house of ill repute.
Effects: +15% Health regen on city +10% ally health regen on city +120 XP when recruiting a unit on units

Living Lab Tools Faction: All except Forgotten Obtained: Era V Type: City Improvement Focus: Science	Costs: 3000 25 10 20 per		These animated assistants don't complain about hours, wages, or dangerous chemicals; their relentless progress increases the amount of Science generated.
Effects: +100% on city Limited to one copy in your empire

Military Reserves Faction: All Obtained: Era V Type: City Improvement Focus: Military	Costs: 2000 10 5 2 per		Training a fraction of the local civilian population in the basic skills of combat not only means a significant boost for paint balling outfits, but also increase the empire's defensive capabilities.
Effects: +4 (+40 with ELCP) Fortification recovery per turn on city +400 Fortification on city +1 max unit slots on militia

Razor Palisades Faction: All Obtained: Era V Type: City Improvement Focus: Fortification	Costs: 2000 10 5 7 per		Walls and windows are not usually viewed as lethal offensive weapons. However, the use of needles, spikes, traps, and blades can turn even the most innocuous entry into a lethal gauntlet.
Effects: +60 Fortification on Regional Building +4 Fortification Recovery on Regional Building

Scientific Envoy Faction: All except Forgotten Obtained: Era V Type: City Improvement Focus: Trade Routes	Costs: 2000 20 7 per		Diplomats versed in science and technology travle your empire's trade routes, learning new disciplines from foreign lands. Scientific knowledge grows more rapidly.
Effects: +1 Trade Routes max on city +50% on city trade routes

The Octagon Faction: All Obtained: Era V Type: Unique Building Focus: Military	Costs: 4000 20 40 per		This vast structure houses - and streamlines - the operations of your growing government staff. Better flow, storage, and processing of information means better decisions and faster growth.
Effects: +20 XP per turn on governor Can only be built once in your empire

Town Criers Faction: All Obtained: Era V Type: City Improvement Focus: Dust	Costs: 2000 25 10		Charismatic individuals are hired by the state and trained in advanced persuasive techniques, paving the way for armies of cheap labor to help accelerate the completion of large projects at reduced cost.
Effects: +50 on city +40% on city

Traitor's Lottery Faction: All Obtained: Era V Type: City Improvement Focus: Security	Costs: 2000 10 5 -8 per		By inaugurating a lottery system that covertly rewards those who achieve the most denouncements of suspicious friends and kin, the chances of uncovering enemy operatives is better than ever.
Effects: +30 security on city

Volcanic Leecher Faction: All Obtained: Era V Type: City Improvement Focus: Resources	Costs: 2000 10 10 10 10 10 per		Powered by the violent magma beneath, this machine enhances mineral yields on volcanic terrain.
Effects: Needs an exploited volcanic tile to be built +5 Resource on strategic resource extractor

Faction-Specific

Aurigan Archive Faction: Kapaku Obtained: Faction Quest Type: City Improvement Focus: Science	Costs: 1200 15 15 8 per		No longer lost to the coming ice, all the Endless' ventures on Auriga will be catalogued an maintained for time immemorial. An oasis of knowledge for historians - and scientists.
Effects: +8 on terrain with ruins Limited to one copy in your empire

Surreptitious Research Faction: Forgotten Obtained: Era V Type: City Improvement Focus: Trade Routes	Costs: 2000 20 7 per		By stealthily listening in on conversations, gaining access to draft versions of contracts, and otherwise tipping the odds in their favor, Forgotten Trade Routes do miraculously well.
Effects: +1 trade routes max on city +50% on city trade routes

Era VI

Temple of the Earth's Core Faction: All Obtained: Faction Quest Type: City Improvement Focus: Victory	Costs: 36000 40 40		It is a building and an energy source and a processing center; a fusion of Dust and matter that transcends any existing knowledge. By reactivating this long-dorment temple of the Concrete Endless, a faction can secure the future of their planet - and at the same time be humbled by the vast gulf of ignorance that separates them from the long-lost masters who first built this marvel.
Effects: Triggers the Wonder Victory once built Limited to one copy in your empire

1st Winter

Nyctalopian Lenses Faction: All Obtained: 1st Winter Type: City Improvement Focus: Vision	Costs: 200 10		A simple modification to windows in public buildings (simple if you master Pearls and Dust magics, that is) allows those within to see movement at night as well as they can in daytime.
Effects: Provides immunity to Winter vision penalty on City and Regional Buildings +10% on City

2nd Winter

Chapel of Auriga Faction: All Obtained: 2nd Winter Type: City Improvement Focus: Minor Village	Costs: 400 10		A humble yet striking chapel, decorated with images of Auriga, becomes a place of reverence and draws lesser peoples to live and work in your city.
Effects: +1 on City per Pacified Village Does not apply to destroyed or converted Villages

Ice Works Faction: All Obtained: 2nd Winter Type: City Improvement Focus: Industry	Costs: 300 10		Far from being wastelands, frozen lakes and rivers provide fish, furs, ice, and other useful products during winter.
Effects: Need an exploited River, Lake or Sea Tile to be built +10 on terrain with River during Winter +10 on terrain with Sea or Lake during Winter season with ice shelf

3rd Winter

Ward of Auriga Faction: All Obtained: 3rd Winter Type: City Improvement Focus: Military	Costs: 600 30		Any enemy troops daring to enter your city are struck by the holy wrath of Auriga; she does not wish to have her believers defiled!
Effects: +0.5 Retaliation Damage per Fortification on City Damage is spread across all units of unfriendly army at the start of the turn