Kublai Khan lives on in the popular imagination thanks to these two lines of poetry by Coleridge. But the true story behind this legend is even more fantastic than the poem would have us believe. He inherited the second largest land empire in history from his grandfather, Genghis Khan. He promptly set about extending this into the biggest empire the world has ever seen, extending his rule from China to Iraq, from Siberia to Afghanistan. His personal domain covered sixty-percent of all Asia, and one-fifth of the worlds land area.