(A Tower of Babel, for example, costs the equivalent of 3000 coins and 3000 supplies to produce the 150 Bronze Age goods needed. In part, this is because the initial resource costs of GBs go up significantly - by nearly a factor of 3 for each age. It's difficult to figure out exactly how much though, and whether the difference is fair or not. On reviewing their benefits, it is clear that some ARE better than others. In effect, they are like large Premium buildings (often much better!), which makes sense given that many were at least partially bought with diamonds, and/or require a LOT of investment to complete. Great Buildings are definitely better and more interesting than regular buildings. I am also trying to update this analysis with some thoughts about what minimum levels you should try to achieve, for the GBs to be worthwhile.
The calculations are based on data in the Encyclopedia of Great Buildings. This is a series of ideas and thoughts about just how good Great Buildings actually are, as well as how they compare with each other.
