You can only have 2 wonders built at the same time in 1 town, if you wish to have more wonders you will have to build them in other towns. You cannot build two wonders across the civ at the same time as well, you need to have a wonder finished before you can build the next one.
Having 2 wonders in 1 town at the same time will grant you an additional buff.
Buffs are listed below:
| War Defensive | War Offensive | Economic | Production | Scientific | Cultural | |
|---|---|---|---|---|---|---|
| War Defensive | Impervious: All of your wonders & structures gain +30% hitpoints and control blocks gain +50% bonus hit points from era scaling. |
Veteran: +4 Health permanently to all Residents. |
Fortification payout: Gives you +1% income rate per unique Tower Level(s) unlocked in the host town. |
Entrenchment: If you're involved in a war and you're not the aggressor, your Civilization has +85% Hammers toward defensive structures and their upgrades. |
Defensive Protocol: The host town can build two more additional towers by your choice. |
Border Guards: Every 10 seconds, heal your Residents inside your own borders by [0.25 * Host Town's Culture Level] Hit Point. |
| War Offensive | Total War: During war, reduce the hitpoints and range of all enemy strucutres by x65%. |
Villager: When you pillage a town, your civilization gain coins equal to its upkeep. You also pillage an additional 30% of strategic goods. |
Gears of war: -35% hammers and growth cost for units and catalysts in all towns. |
Project Mjolnir: Once you pillage a town, you gain 2% Beaker Rate per town (up to 16%), and if you pillage a Civilization, it counts as every town until pillage is over. |
Grand Heist: Once you pillage a town, you gain 2% Culture Rate per town (up to 16%), and if you pillage a Civilization, it counts as every town until pillage is over. |
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| Economic | Costco: Increases Income Rate inside the Civilization by 35% |
International globalization: Hammers that are not used in the host town are multiplied by 3 then converted to Coins during the hourly tick. |
Research & Development: Whenever you finish researching a technology the host town produces 6 hourly ticks of income and offers 3% income rate per science structure in the host town. |
Offshore Tourism: You convert 7.5% of your Coins to Culture in the host town. |
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| Production | Autonomous Megalopolis: +25% hammer rate across the civilization. |
City in the Skies: You gain +2 wonder research slot, reduces wonder's coins, beakers and cultural research cost by 30.00% |
Luxury Architect: During Golden age, increase Hammer rate and Culture rate by 25%. |
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| Scientific | Artificial Intelligence: You can upgrade 3 structures to their Wonder Upgrade level besides your current Wonder Upgrade level in the Host town. |
Ancestral Knowledge: The Host Town gain +25 culture and beaker per culture zone and is affected by it's rate |
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| Cultural | National Propaganda: The host Town gain 1 Culture Zone for every 3 Culture levels. |