I know the theory, using a modding program you can create a patch of squares all containing the oasis version of desert, which when irr'ed and RR'ed yields 6 wheat per square. Plop a city in the middle of that, and its "fat cross" area of control is 21 total squares = 126 wheat, which can support 63 citizens in the city. But has anyone actually done that? Here's my problem with the theory. Making the citz as happy as possible, you can parade-pop up to size-42 with 21 citz on the oases and 21 citz as specialists (with 13 phantom taxmen). But when you parade-pop to 43 citz, there is no way to make 22 citz happy, because there are only 21 squares available. You can be crafty and make that last big pop a double, moving the city from 42 to 44 citz on the same turn, but from then on you have to grow the city organically. With 44 citz eating 88 wheats, this leaves only 38 wheat to refill the foodbin, which is 45 wheats wide by 10 deep = 450. The Granary line cuts the goal down to 225 wheats to make the jump to 45 citz. OK, that's only 6 or 7 turns. But with every pop, the new citz eats 2 wheat and the foodbin grows by 10. To make the jump from 50 to 51 citz, you need 255 wheats but the surplus is now only +26 per turn = 11 turns. It gets worse quickly. To jump from 59 -> 60 citz takes 39 turns. To jump from 60 to 61 citz, you need 305 wheats but the surplus is now only 6 wheats per turn. That takes 52 turns. From 61 -> 62 takes 79 turns. To get the crowning 63rd citizen, it takes 315 wheats at 2 per turn which is 159 turns. Just adding those last 4 citz takes 329 turns. Even playing at Chieftan until 2100 AD, the game is only 600 turns long. I just don't think there's enough time. Has anyone ever actually succeeded, getting a city up to 63 citizens?