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 "Distrust and caution are the parents of security."
– Benjamin Franklin
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Game Info[]

  • 99.9% reduction in enemy spy effectiveness in this city
  • 25% reduction in enemy spy effectiveness for all other cities
  • BNW-only.png Negates the Tourism Tourism bonus from other players' Internet technology.


The Great Firewall is a Wonder for anti-spy fanatics who detest having technologies stolen. It will practically stop all enemy spies acting on your soil in their tracks. As an added (and much more useful) bonus, the Great Firewall negates the Internet technology of enemies, making your nation far less susceptible to the end-game cultural push.

The Great Firewall is also worth having if you yourself are going for a culture victory - not for the advantages it provides, but because it prevents anyone else from having them.

Civilopedia entry[]

The Great Firewall is a restrictive internet monitoring and censorship program used to control the flow of information available to a civilization's people through the internet. By limiting the public's access to potentially volatile information available online, government agencies can limit potential backlash and other dissension regarding unpopular policies and government programs.


  • Although it has a powerful non-espionage-related effect (negating other players' Tourism Tourism bonuses from The Internet), the Great Firewall is not buildable in games where spying is disabled.
  • It is not necessary to research The Internet before building this wonder since computer hacking appeared before the Internet.


Civilization V Wonders [edit]
World Wonders Alhambra GodsKings5 clear.pngAngkor WatBig BenBorobudur BNW-only.pngBrandenburg GateBroadway BNW-only.pngCN Tower GodsKings5 clear.pngChichen ItzaColossusCristo RedentorEiffel TowerForbidden PalaceGlobe Theatre BNW-only.pngGreat Firewall GodsKings5 clear.pngGreat LibraryGreat LighthouseGreat Mosque of Djenne GodsKings5 clear.pngGreat WallHagia SophiaHanging GardensHimeji CastleHubble Space Telescope GodsKings5 clear.pngInternational Space Station BNW-only.pngKremlinLeaning Tower of Pisa GodsKings5 clear.pngLouvreMachu PicchuMausoleum of Halicarnassus1Neuschwanstein GodsKings5 clear.pngNotre DameOracleParthenon BNW-only.pngPentagonPetra GodsKings5 clear.pngPorcelain TowerProra BNW-only.pngPyramidsRed Fort BNW-only.pngSistine ChapelStatue of LibertyStatue of Zeus1StonehengeSydney Opera HouseTaj MahalTemple of Artemis1Terracotta Army GodsKings5 clear.pngUffizi BNW-only.pngUnited Nations
National Wonders Circus MaximusEast India Company BNW-only.pngGrand Temple GodsKings5 clear.pngHermitageHeroic EpicIronworksNational CollegeNational EpicNational Intelligence Agency GodsKings5 clear.pngNational TreasuryNational Visitor Center BNW-only.pngOxford UniversityPalace
Natural Wonders Barringer CraterCerro de Potosi1El Dorado1Fountain of Youth1Grand MesaGreat Barrier ReefKing Solomon's Mines BNW-only.pngKrakatoaLake Victoria BNW-only.pngMt. FujiMt. Kailash GodsKings5 clear.pngMt. Kilimanjaro BNW-only.pngMt. Sinai GodsKings5 clear.pngOld FaithfulRock of GibraltarSri Pada GodsKings5 clear.pngUluru GodsKings5 clear.png
1 Requires a DLC

GodsKings5 clear.png Valid only in the Gods & Kings expansion pack.
BNW-only.png Valid only in the Brave New World expansion pack.