This melancholy picture was drawn above nine hundred years after the fall of the Western Empire, and even of the Gothic kingdom of Italy. A long period of distress and anarchy, in which empire, and arts, and riches had migrated from the banks of the Tiber, was incapable of restoring or adorning the city; and as all that is human must retrograde if it do not advance, every successive age must have hastened the ruin of the works of antiquity. To measure the progress of decay, and to ascertain, at each era, the state of each edifice, would be an endless and a useless labor; and I shall content myself with two observations which will introduce a short inquiry into the general causes and effects. 1. Two hundred years before the eloquent complaint of Poggius, an anonymous writer composed a description of Rome. His ignorance may repeat the same objects under strange and fabulous names. Yet this barbarous topographer had eyes and ears; he could observe the visible remains; he could listen to the tradition of the people; and he distinctly enumerates seven theatres, eleven baths, twelve arches, and eighteen palaces, of which many had disappeared before the time of Poggius. It is apparent that many stately monuments of antiquity survived till a late period, and that the principles of destruction acted with vigorous and increasing energy in the thirteenth and fourteenth centuries. 2. The same reflection must be applied to the three last ages; and we should vainly seek the Septizonium of Severus, which is celebrated by Petrarch and the antiquarians of the sixteenth century. While the Roman edifices were still entire, the first blows, however weighty and impetuous, were resisted by the solidity of the mass and the harmony of the parts; but the slightest touch would precipitate the fragments of arches and columns that already nodded to their fall. After a diligent inquiry, I can discern four principal causes of the ruin of Rome, which continued to operate in a period of more than a thousand years. I. The injuries of time and nature. II. The hostile attacks of the Barbarians and Christians. III. The use and abuse of the materials. And IV. The domestic quarrels of the Romans.