I am in gunpowder age and i am in a hurry for industrial so i dont level most of the buildings but i faced now several upgrades that require 3 million ressource which is hard to gather at once and i need to build some defence for my markets, so originaly i prefer forbidden city since once i upgrade my units at Industrial i am going for medals but currently it seems colosseum will give me beter protection so i dont know, i cant buy crowns to change wonders and i already have one stonehange that i need to change with crowns so what to choose i wonder ?