This long enumeration of provinces, whose broken fragments have formed so many powerful kingdoms, might almost induce us to forgive the vanity or ignorance of the ancients. Dazzled with the extensive sway, the irresistible strength, and the real or affected moderation of the emperors, they permitted themselves to despise, and sometimes to forget, the outlying countries which had been left in the enjoyment of a barbarous independence; and they gradually assumed the licence of confounding the Roman monarchy with the globe of the earth. But the temper, as well as knowledge, of a modern historian require a more sober and accurate language. He may impress a juster image of the greatness of Rome by observing that the empire was above two thousand miles in breadth, from the wall of Antoninus and the northern limits of Dacia to Mount Atlas and the tropic of Cancer; that it extended in length more than three thousand miles, from the Western Ocean to the Euphrates; that it was situated in the finest part of the Temperate Zone, between the twenty-fourth and fifty-sixth degrees of northern latitude; and that it was supposed to contain above sixteen hundred thousand square miles, for the most part of fertile and well-cultivated land.
- Gibbon, Edward, and Hugh Trevor-Roper. The Decline and Fall of the Roman Empire. New York: Alfred A. Knopf, 1993. Print. 33.