Thanks for the great guide. Pyramids, Sun Tze and Leos are certainly my most favoured wonders. The Pyramids are however usually impractical to build. It is of course pretty standard to give masonry to nearby AI in the hope that they will build them for you. Regarding the Great Library, it seems most useful at Sid level, and is, perhaps surprisingly, often possible to build it as the AI don't tend to research literature much.