After Feudal Age You will see a crossed Market icon, but cannot build it. This added (and in tech tree too) to make it obvious the new rule.



From Imperial Age a new technology is in the Mill. It's free, but takes 30 minutes to research. When it's done, you can build Markets as normal. This technology is not auto-researched in Post-Imperial Age, just like the Spies.




Special thanks to:
- Keisari Tapsa's and Hawk_Ruralist's aoe tools
Mod requested by _RdmCiv_