The scene shifts once more; centuries have slipped by and the city of Rome has become a desolation. Marble columns and granite obelisks lie prone upon the ground, and many more have found graves beneath the soil. Enormous mounds of earth and masonry, disfigured with rude battlements, represent all that is left of the great monuments; crumbling ruins and waste land stretch away to the walls, and without the campagna has become a fever-stricken wilderness. Military fortresses, watch-towers on the walls, and bell-towers of churches are the only buildings kept in repair. Gaunt wolves snarl and fight over the refuse heaps under the walls of S. Peter's. A gibbet crowns the bare summit of the Capitol, goatherds pasture their flocks on its sides and along the green slopes of the Forum, and thus the hill and the tract of land at its foot have returned once more to their primitive pastoral state and their pastoral names, the "hill of goats" and the "field of cows." Over all broods the ominous silence of terror, bloodshed, and pestilence. Upon this scene of ruin the Renaissance and modern city of Rome was to come into being, and the mediaeval buildings were in their turn to be destroyed or overlaid with a modern garb, leaving only a few churches and convents, a few towers and palaces, a few cloisters to mark the passing of the centuries. The remains of the imperial city are described by a modern writer[2] lying like a skeleton beneath the modern town, beneath streets, villas, and public buildings; and from the fifteenth century, when Rome, which had only just escaped an extinction as complete as that of her neighbour and ancient rival Tusculum, began once more to rise from the dust, to modern times, all the building materials have been furnished by her ruins. The few monuments that have been preserved owe their safety to their consecration as churches. [2] Gabelli, _Roma e i Romani_. [Illustration: ARCH OF TITUS Erected to commemorate this Emperor's destruction of Jerusalem, A.D. 70. It is decorated with reliefs of the seven-branched candlestick and other spoils of the Temple which were carried through the city in the Emperor's triumph. See page 31.]