The temple had been destroyed by fire in the time of Sulla, and its restoration was not as yet finally completed at the time of our imaginary walk.[34] It faced towards the river and the Aventine, i.e. south-east, according to the rules of augural lore, like all Roman public buildings of the Republican period. From the platform on which it stands we look down on the Forum Boarium, from which we started, connected with the Forum by the Velabrum and the vicus Tuscus; and more to the right below us is the Campus Martius, with access to the city by that Porta Carmentalis which Evander showed to Aeneas. This spacious exercise-ground of Roman armies is already beginning to be built upon; in fact the Circus Flaminius has been there for more than a century and a half, and now the new theatre of Pompeius, the first stone theatre in Rome, rises beyond it towards the Vatican hill. But there is ample space left; for it is nearly a mile from the Capitol to that curve of the Tiber above which the Church of St. Peter now stands; and on this large expanse, at the present day, the greater part of a population of nearly half a million is housed. I do not propose to take the reader farther. We have been through the heart of the city, as it was at the close of the Republican period, and from the platform of the great temple we can see all else that we need to keep in mind in these chapters.
The walk we have been taking has led us only through the heart of the city, in which were the public buildings, temples, basilicas, porticos, etc., of which we hear so much in Latin literature. It was on the hills which are spurs of the plain beyond, and which look down over the Forum and the Campus Martius, the Caelian, Esquiline, and Quirinal, with the hollows lying between them, and also on the Aventine by the river, that the mass of the population lived. The most ancient fortification of completed Rome, the so-called Servian wall and _agger_, enclosed a singularly large space, larger, we are told, than the walls of any old city in Italy;[35] it is likely that a good part of this space was long unoccupied by houses, and served to shelter the cattle of the farmers living outside, when an enemy was threatening attack. But in Cicero's time, as to-day, all this space was covered with dwellings; and as the centre of the city came to be occupied with public buildings, erected on sites often bought from private owners, the houses were gradually pushed out along the roads beyond the walls. Exactly the same process has been going on for centuries in the University city of Oxford where the erection of colleges gradually absorbed the best sites within the old walls, so that many of the dwelling-houses are now quite two miles from the centre of the city. The fact is attested for Rome by the famous municipal law of Julius Caesar, which directs that for a mile outside the gates every resident is to look after the repair of the road in front of his own house.[36]