"Her primeval state, such as she might appear in a remote age, when Evander entertained the stranger of Troy, has been delineated by the fancy of Virgil. This Tarpeian Rock was then a savage and solitary thicket; in the time of the poet it was crowned with the golden roofs of a temple; the temple is overthrown, the gold has been pillaged, the wheel of fortune has accomplished her revolution, and the sacred ground is again disfigured with thorns and brambles. The hill of the Capitol, on which we sit, was formerly the head of the Roman Empire, the citadel of the earth, the terror of kings; illustrated by the footsteps of so many triumphs, enriched with the spoils and tributes of so many nations. This spectacle of the world, how is it fallen! how changed! how defaced! The path of victory is obliterated by vines, and the benches of the senators are concealed by a dunghill. Cast your eyes on the Palatine Hill, and seek among the shapeless and enormous fragments the marble theater, the obelisks, the colossal statues, the porticoes of Nero's palace; survey the other hills of the city,--the vacant space is interrupted only by ruins and gardens. The Forum of the Roman people, where they assembled to enact their laws and elect their magistrates, is now inclosed for the cultivation of pot-herbs, or thrown open for the reception of swine and buffaloes. The public and private edifices that were founded for eternity lie prostrate, naked, and broken, like the limbs of a mighty giant; and the ruin is the more visible, from the stupendous relics that have survived the injuries of time and fortune."... 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.