Nevertheless this deserted country once teemed with life--some seventy cities, it is surmised, once covered the plain, and countless villas and farms, the property of Roman patricians, consuls, and senators, made it a veritable garden. Driving within the walls of Rome being forbidden save to the Emperor and the Vestals, the tenants of these villas met the _rheda_ outside the gates, drawn by its pair of fast-stepping horses. These light carriages were gaily painted with some classical subject, as the peasants' carts still are in Naples, and a leather hood with purple hangings protected the owner from the heat. At all the cross-roads are fountains for the use of man and beast, near which a seat shaded by ilex or olive awaits the tired traveller, as we may see it still awaiting him for example at the Porta Furba on the way to Frascati. Excellent roads kept in excellent repair honeycomb the plain, while aqueducts, temples, trees, shrines, monuments, and statues rejoice the eye and enliven the journey. Villa, dependents' dwellings, the mausoleum, the farms, are seen a long way off in this flat land, and not the least curious feature as the traveller approaches is the formal garden still known to us as "an Italian garden," an entirely artificial creation where each tree and shrub has not only its prescribed place in the scheme, but its prescribed form, giving the impression of a continuous trained English box hedge. The shrubs are tortured into the semblance of beasts and snakes, the name of the owner being sometimes cut in the foliage, a device which may still be seen in the modern grounds of the Villa Pamfili-Doria. The most conspicuous features of the campagna from classical times are the aqueducts, stretching right across the _agro_ to the walls of Rome; gigantic remains of the Claudian aqueduct extend for six miles, and the ancient _peperino_ arches of the favourite _acqua Marcia_, which cross the Claudian aqueduct at Porta Furba, still bring water to the city. As classic Rome is represented by the aqueducts and mausolea, so feudal Rome is represented by the towers which rose in the campagna between the eighth and the fifteenth centuries--the early semaphores on the coast-line to give warning of the approach of Saracen or Corsair, the vedette towers which figured in the baronial wars, and the later fortified towers of the baron's castle. Last but not least Christianity has strewed the campagna with chapels and shrines, the earliest of which supplanted the cult of the local pagan divinity in the ages when Christianity was gradually driving the religion of imperial Rome into the villages and hill retreats. So S. Sylvester replaced the woodland deities, Michael supplanted the god of war, S. George became the Christian protector against the depredations of ferocious beasts, S. Caesarius replaced the genius of the imperial Caesars. Of the same period are the basilicas erected over the _sepulcretum_ of a martyr at the mouth of a catacomb.