In addition to a Tech or perhaps terrain requirement (i.e. coast), every World Wonder requires a certain number of Social Policies in order to be built or a Policy to be finished or an Ideology chosen.
Investing costs rise for every city in the empire, listed prices are for one city. Investment, although rather costly, gives 25% of the cost (instead of 50%). Babylon's investment bonus happens to also work on Wonders gives them an additional 15%. Division of Labor (Industry) invests an additional 10% to the Wonder. Be sure to invest before the Wonder goes to 75% completion, as by than you can no longer invest.
Losing a Wonder race grants you some Yield as compensation (it is 33% by default).
Great Engineers can finish a Wonder in the same turn if they would give more than the Wonder costs (also, each Manufactory YOU have made increases the Engineer's bulb by 20%).
Sources of additonal % for Wonders:
Stone increases the of pre- Medieval Era Wonders by 10%.
Marble increases the of pre- Industrial Era Wonders by 15%.
Egypt has +20% towards Wonders (+40% during a [ as well as +20% from being in a ]).
Communism (Order): +20% towards Wonders
Every World Wonder you build increases the cost of other World Wonders, particularly those in the same Era. Take note when taking a City that has plenty of Wonders already. Likewise, you can try to enter a new Era to make the current Wonder you were building cheaper.
+2 from Writers, Artists, and Musicians in all Cities.
-1 Unhappiness Urbanization from All Cities.
10
Himeji Castle
800
400
1
+2 Great Engineer Points
Grants a free Castle in the city
+1 supply cap from every City
+15% combat strength for units fighting in friendly territory
+10% Defense for all Cities.
10
Leaning Tower of Pisa
800
400
+1
Free Great Person of your choice appears near the capital
+10% generation of Great People in all cities and +15% to this City (25% total)
10
Porcelain Tower
900
450
+1 -1 Unhappiness from Illiteracy in this City.
+2 Great Scientist Points
Free Great Scientist
50% more generated from Research Agreements. If Research Agreements are disabled, +25% to the City instead.
12
Research Agreements affect how this Wonder works.
Red Fort
900
450
+1
+6 Defense, 100 HP
+1 Great Scientist Point
+5% supply cap from pop in all cities
Grants a free Arsenal in the city.
Free Great Engineer
Increases City's by 50% and Range by 1.
Requires Completion of Fealty
Sistine Chapel
900
450
+1
2 Great Works of Art or Artifact slots (+3 and +3 if themed)
+10% in all cities
11
Summer Palace
900
450
+1
+1 Great Diplomat Points
+1 Paper
Chanceries give +1 and +3 .
All Diplomatic Units receive the Nobility promotion: +15 influence when you conduct a Diplomatic Mission with a city state, and the ability to enter a rival player's territory without an Open Borders agreement.
+20% to Diplomatic Units.
11
Taj Mahal
900
450
+2
+1 Points for every 2 citizens in the city
-25% religious needed modifier in all cities
Starts a .
+3 , , and for every Religion present in City.
12
Uffizi
900
450
+2
3 Great Work of Art or Artifact slots (+10 if themed)
Grants 2 additional delegates in the World Congress for every 8 city states in the game
Requires completion of Statecraft
Brandenburg Gate
1250
570
+1
-1 Unhappiness from Poverty in this City.
+2 Great Scientist Points
Free Great General
+15 XP to all units built in the city
+10 supply cap
15
Eiffel Tower
1250
570
+1
cost of adopting new policies reduced by 10%
15
Louvre
1250
570
+2
4 Great Work of Art or Artifact Slots (+15 if themed)
Free Great Artist, 2 Archaeologists, and a Museum
Requires Completion of Artistry
Neuschwanstein
1000
530
+6 , +4
+1 Great Merchant Points
+1 , , and from every Castle
14
City must be built within 2 tiles of a mountain that is inside your territory
Slater mill
1000
530
+5
+1 Great Engineer Points
+4 Coal
Grants a free Factory in the city
14
City must be built next to a river
Modern[]
Name
Construction Cost
Effect
Policy Requirement
Note
Broadway
1700
760
+2
3 Great Works of Music slots (+20 if themed)
Free Great Musician
250 when you build a Building in this City, scales w/ Era
Requires Completion of Industry
Cristo Redentor
1700
760
25 , +5
+2 / Points/ from Hotels;
20
Empire State building
1600
690
+1
Grants a free Stock Exchange in the city
Free Great Person of your choice
Specialists in all cities produce +1
19
Prora
1700
760
+1
+1 for every 2 polices you have adopted
1 Free Social Policy
Gain 25 from pillaging, scaling with era.
Spies cannot disrupt WW Production in the City
Requires Autocracy and 20 total policies
City must be built on the coast.
Statue of Liberty
1600
690
+1
+1 from Specialists in every cities
1 Free Social Policy
Requires Freedom and 18 total policies
Ideology Wonders are destroyed if you change Ideology
The Motherland Calls
1600
690
+1
-1 Unhappiness from Distress in this City.
Grants a free Police Station in the city
1 Free Social Policy
No unrest/rebellion from spies in this city, and your spies are much more likely to cause unrest and rebellion via advanced actions. Also increases chance of building sabotage via AA.
Requires Order and 18 total policies
Ideology Wonders are destroyed if you change Ideology
Corporations[]
All Corporations have the following effect:
Every Franchise in a foreign City increases you with them by 2%.
Name
Construction Cost
Maintenance
Effect
Note
Civilized Jeweler, Inc.
1300
5
Receive a free Civilized Jewelers Office in this City, and unlocks construction of Civilized Jewelers Offices in owned Cities.
Banks and Customs Houses in all cities produce +4 points.
+1 and trade routes move twice as fast.
Requires a Global Monopoly on Gold, Silver, Gems, Pearls, Amber, or Jewelry.
Firaxite Materials, Inc.
1300
4
Receive a free Firaxite Materials Office in this City, and unlocks construction of Firaxite Materials Offices in owned Cities.
+1 and trade routes can not be pillaged other than through a Declaration of War.
Factories and Universities in all cities produce +3 .
Requires a Global Monopoly on Iron, Aluminum, Marble, Copper, Jade, or Porcelain.
Giorgio Armeier, Inc.
1300
3
Receive a free Giorgio Armeier Office in this City, and unlocks construction of Giorgio Armeier Offices in owned Cities.
+2
+2 in all cities from Museums and Opera Houses, and +2 from Writers, Artists, and Musicians in all cities.
Requires a Global Monopoly on Silk, Cotton, Dye, Furs, or Lapis Lazuli.
Hexxon Refineries, Inc.
1300
4
Receive a free Hexxon Refineries Office in this City, and unlocks construction of Hexxon Refineries Offices in owned Cities.
+2
+15% for all units that require oil, uranium, or aluminum to build. +3 on all Coal, Nuclear, and Solar plants.
Requires a Global Monopoly on Coal, Oil, Incense, Uranium, Perfume, or Glass.
Centaurus Extractors, Inc.
1300
4
Receive a free Centaurus Extractors Office in this City, and unlocks construction of Centaurus Extractors Offices in owned Cities.
+2 and doubles sea trade route maximum range
Harbors and Seaports in all cities produce +2
Requires a Global Monopoly on Horse, Whales, Crab, Ivory, or Coral.
Trader Sid's, Inc.
1300
45
Receive a free Trader Sid's Office in this City, and unlocks construction of Trader Sid's Offices in owned Cities.
+2 and doubles land trade unit maximum distance
Caravansaries and Markets in all cities produce +3
Requires a Global Monopoly on Spices, Sugar, Salt, Nutmeg, Cloves, Pepper, Cocoa, or Tobacco.
TwoKay Food, Inc.
1300
4
Receive a free TwoKay Office in this City, and unlocks construction of TwoKay Offices in owned Cities.
+2 and trade routes reveal the Fog of War
Grocers and Agribusinesses in all cities produce +3 .
Requires a Global Monopoly onWine, Truffles, Citrus, Olives, Coffee, or Tea.
Atomic[]
Name
Construction Cost
Effect
Policy Requirement
Note
Bletchley Park
2150
840
+5
Grants a free Research lab in the city
2 Extra
Levels up all your existing
Spies cannot do the 'failure' Advanced Action
Spies much more likely to steal science or disrupt world wonders via AA
15% reduction in enemy effectiveness in all cities
+1 Science from Scientists.
Requires the Completion of Raitonalism
Pentagon
1900
790
+1
+2 Great Merchant Points
+1 Supply
Increases Air Unit Cap by 2 in every City.
Receive 2 Free Jet Fighters.
+50% towards Air Units in City and +20 XP.
Owned Spies more likely to disrupt Unit via AA.
Requires the Completion of Imperialism
Information[]
Name
Construction Cost
Effect
Policy Requirement
Note
CERN
3250
1150
+10
Receive 2 Free Techs
+100 Influence with all city states in the world
28
CN Tower
2300
920
+1 Great Merchant Points
Free Broadcast Tower
+1 in all cities
+1 per city
All Great Works produce +2 and +3 .
+50% of the from World Wonders, Natural Wonders, and Tiles is added to the output of the City.
+50% from Great Works.
25
Great Firewall
3000
1070
99.9% reduction in effectiveness of enemy in the city in which it is built.
+10 from Research Labs
25% reduction in effectiveness of enemy in all cities
Negates the bonus from technologies of other players
24
Hubble Space Telescope
3000
1070
+1 Great Scientist Points
2 Free Great Scientists
Grants a free Spaceship Factory in the city
+25% when building Spaceship Parts
28
Sydney Opera House
2300
920
+25% in this city
1 Free Social Policy
2 Great Work of Music slots (+15 if themed)
26
City must be built on the coast
World Congress[]
Name
Construction Cost
Effect
Note
Crystal Palace
1250 per Civ
+1
1 Empty Great Work of Art or Artefact Slot
The Empire enters a .
+2 and for all Factories in owned cities.
May only be built collaboratively through the World Congress.
Grand Canal
500 per Civ
+1
Receive an additional Trade Route.
Grants all Naval Units except Submarines and Carriers the Treasure Fleet promotion, which grants +10% combat strength when attacking, +1 Sight, and the ability to heal outside friendly territory.
May only be built collaboratively through the World Congress.
International Space Station
2750 per Civ
+1 from Scientists, and +1 from Engineers.
Great Scientists provide 33% more when used to discover a technology.
May only be built collaboratively through the World Congress.
Olympic village
1400 per Civ
+3
+3
25% of the from World Wonders, Natural Wonders, and Improvements (Landmarks, Moai, Châteaux) is added to the output of the city.
May only be built collaboratively through the World Congress.
United Nations
1700 per Civ
1 Great Diplomat Point
Earn 25 Influence points with all City-States you have met when you expend a Great Person.
Receive an additional Delegate in the World Congress.
Triggers a , as well as the United Nations Special Session of the World Congress.
May only be built collaboratively through the World Congress.