Could you comment on where your capital was during this run? ^^
Starting capital, Beijing (after Yuan), Karakorum (after forming Mongol Empire). Beijing and Karakorum both developed to 50 in age of Rev because you get stupid amounts of points from razing. I actually stopped bothering at the end if I didn't need to reduce OE just to save time, there should really be a sortable raze button on the same screen as exploiting development in the macro builder.
Late-game picture of finances: