Marco Polo's book — The Travels, TheDescription of the World, II Milione, orwhatever we prefer to call it — is unquestionablythe best known of all contemporary sources on thatunprecedented historical phenomenon, the MongolEmpire of the thirteenth and fourteenth centuries.That is not to say that it is by any means the bestsource. As history, it cannot compare, for example,with Rashīd al-Dīn's Jāmi'al-tawārīkh, and as a European travelaccount (if that is what it is), it is not remotelyin the same class as Friar William of Rubruck'sItinerarium. Nevertheless, whileFriar William may have been completely forgotten andChinggis Khan remembered only as someone a politicalreactionary can, by dint of great effort, gethimself (or herself, one should hasten to add) tothe right of, there are many who know at leastsomething about Marco Polo: perhaps principally thefact that he went to China — as almost everyone hashitherto supposed that he did.