National wonders may be constructed once a specific building is existent in all cities in your empire.
Circus Maximus
Tech Requirement: Construction
Cultural Output: 1
Buidling Required Colosseum
Effects: +5 Happiness
Hermitage
Tech Requirement: Archaeology
Building Required: Museum
Effects: Doubles output of Culture in this City.
Heroic Epic
Tech Requirement: Iron Working
Cultural Output: 1
Building Required: Barracks or Russian Krepost
Effects: All new Units in this City receive the Morale Promotion for free.
Ironworks
Tech Requirement: Chemistry
Cultural Output: 1
Building Required: Workshop, Iroquois Longhouse
Effects: +20% Production in the City where this is built.
National College
Tech Requirement: Writing
Cultural Output: 1
Building Required: Library, Chinese Paper Maker
Effects: +50% Science in the City where this is built.
National Epic
Tech Requirement: Philosophy
Cultural Output: 1
Building Required: Monument
Effects: +25% Great People generation in the City where this is built.
National Treasure
Tech Requirement: Currency
Cultural Output: 1
Building Required: Market
Effects: +8 Gold
Oxford University
Tech Requirement: Education
Cultural Output: 1
Building Required: University, Siamese Wat
Effects: Gain a free Technology.
Palace
Tech Requirement: None
Cultural Output: 1
Effects: Indicates the Capital City and is built automatically for free. Cities connected to the Capital by roads produce additional Gold. Also produces an extra +2 Production, +3 Science, +2 Gold, and +2 Defense for this City.
