You can build one Wonder in each of these Ages:
All of the Wonders are built in 5 stages. Each stage requires 4 citizens to upgrade with varying food and time, depending on the tier of the Wonder, to finish.
Wonders can be changed for an amount of Crowns and it requires 4 citizens. The change takes place instantaneously and you don't have go through the 5 stages again. All changes cost 600 Crowns(can be reduced with University research).
Before constructing the last stage (5/5), you may change your Wonder for free.
Pages in category "Wonder buildings"
The following 20 pages are in this category, out of 20 total.