Civilization Revolution/Wonders

Wonders may be treated as exceptional and unique buildings. They are typically expensive and provide a very powerful bonus or effect. Additionally, each Wonder may be built only once per game; multiple cities and civilizations may simultaneously attempt to construct the same wonder, but only the first city to complete the wonder will obtain it - all other constructing cities must change their construction objectives. If you have been beaten to a wonder, you may reassign the accumulated hammers to another building, wonder, or unit – but only during the same turn. If you wait, the hammers will be lost.

The World Bank and United Nations wonders are unlike the other wonders in that their completion will constitute an economic or cultural victory, respectively, for the civilization that constructed the wonder. All the wonders are listed in order from left to right in the Hall of Glory in-game.

Certain wonders will be obsolesced by the discovery of a corresponding Technology by any civilization, even if the wonder's owner and first discoverer of the obsoleting technology are the same civilization. For example, the East India Company is made obsolete when any civilization discovers Flight. Once the wonder is rendered obsolete, the unique effect of the wonder is negated. However, the wonder's Culture and contribution towards a Cultural Victory are unaffected.