Everyone who considers the various changes brought by the course of events to human affairs, will, on reflection, be filled with wonder; but I think that those who read ancient history have greater reason to be so, seeing many republics and many great and powerful kingdoms, so to speak, collapse without, in certain cases, leaving even a name, or any memorial behind. The same course of events has caused many races to leave their native countries, and, like proud and rapid rivers, invade those of others, chasing away the ancient inhabitants, and, not content with that, even change their names. So it happens that, nowadays, there are many races whose origin is not known, of which miserable Italy is an example, as, after the ruin of the Roman empire, a multitude of strange and barbarous nations entered from the North, ousted the inhabitants, changed the vulgar tongue, the names of the provinces, rivers, and mountains, moved the towns from their proper sites, and built them up afterwards at a distance from the spots where they first stood. This has not happened to Italy alone, but also to the province of Gallia, which, on its occupation by the fierce nation of the Franks, lost its name as well as its inhabitants. The same happened to Britain, now called England; to Pannonia, which is now Hungary; and to many other countries which it would be tedious to enumerate. But I cannot hold my peace about poor, afflicted Greece, celebrated by all classic writers, which was anciently the home of science and the example of humanity, but now fallen low indeed, being subjected to the empire of the Turks, and inhabited only by barbarous and unlettered tribes. This same calamity has fallen also on the whole of Asia, since (as one reads in the books of M. Marco Polo and the Armenian), great hordes of Tartars issued from the regions of Cathay and overran the countries, and, having settled in their new abodes, changed the names of the provinces to others familiar to the conquerors. Thus Margiana, Bactriana, and Sodiana, provinces near the Caspian Sea, being taken by Zacatai, brother of the Great Can, were called instead the country of Zacatai, from the province of Turquestan, which is beyond the rivers Jaxartes and Oxus.