Please note that I am NOT a professional or an expert, this is just my personal opinion. Oh yeah, Space Age Asteroid Belt and Space Age Venus' GB's won't be featured, as they are too early to judge as of now. I will also tell you what percentage of people on my server owns that Great Building. I'll rate each of these from 0-10, then calculate the average, before translating it to an S to F- system. LTE for Zeus is after EMA) and Spacial Efficiency (SE), which is how the bonuses justify it's space usage. I'll rate each Great Building via 4 catagories: Praticality, which is how useful it's bonuses are Short-term Effciency (STE), which is how useful it is when you build the GB in their intended age and the age after Long-term Effciency (LTE), which is how useful it is serveral ages after the GB's intended age (e.g. So as you all know, there are over 40 Great Buildings in Forge of Empires.