The great buildings are the latest feature to arrive in Forge of Empires with patch 0.22. This allows you to aid your friends and guild members when constructing epic and unique structures with powerful bonuses.
Every age you progress through will offer you the chance to build 2 different great buildings. Each great building has 10 different levels. The higher level the building achieves, the more powerful the bonus it gives you will become. However, before you get to work on these magnificent structures, you will have to acquire blueprints.