Our nineteenth century is not favourable to the creation of edifices fit to rival {280} the Coliseum or St. Peter’s, but there are works of another nature, not less deserving of attention, which may distinguish this third era in the history of Rome. Above all, it will be necessary to protect the city against the floods of the Tiber, and to improve its sanitary condition. The bed of the river will have to be deepened, embankments constructed, and a system of drainage established. It is well known that the quantity of water supplied to the Rome of the ancients was prodigious. In the time of Trajan nine grand aqueducts, having a total length of 262 miles, supplied about 4,400 gallons of water per second, and this quantity was augmented to the extent of one-fourth by canals subsequently constructed. Even now, although most of these ancient aqueducts are in ruins, the water supply of the capital of Italy is superior to that of most other cities.[92] But if the time should ever come when Rome will occupy the whole of the space enclosed within its walls, if ever the Forum should again become the centre of the city, then the want of water will be felt there as much as in most of the other great towns of Europe. Irrespective of the insalubrity of the environs, there is another reason why modern Rome cannot compare with the ancient city. Its streets no longer radiate from a centre towards all the points of the compass, as they did of yore. The Appian Road, which on first leaving the city passes through a curious avenue of tombs, is typical of the old roads, constructed in straight lines, and shortening distances. It is true that these ancient highways have been superseded by railways, but they are still few in number, and Rome is not situated on a trunk line. Elsewhere railways were built from the capital of the country towards its periphery; in Italy, on the contrary, it was Florence, Bologna, and Naples which constructed lines converging upon Rome. * * * * *