Now let us make the fantastic supposition that Rome were not a human dwelling-place, but a mental entity with just as long and varied a past history: that is, in which nothing once constructed had perished, and all the earlier stages of development had survived alongside the latest. This would mean that in Rome the palaces of the Caesars were still standing on the Palatine and the Septizonium of Septimius Severus was still towering to its old height; that the beautiful statues were still standing in the colonnade of the Castle of St. Angelo, as they were up to its siege by the Goths, and so on. But more still: where the Palazzo Caffarelli stands there would also be, without this being removed, the Temple of Jupiter Capitolinus, not merely in its latest form, moreover, as the Romans of the Caesars saw it, but also in its earliest shape, when it still wore an Etruscan design and was adorned with terra-cotta antifixae. Where the Coliseum stands now we could at the same time admire Nero’s Golden House; on the Piazza of the Pantheon we should find not only the Pantheon of to-day as bequeathed to us by Hadrian, but on the same site also Agrippa’s original edifice; indeed, the same ground would support the church of Santa Maria sopra Minerva and the old temple over which it was built. And the observer would need merely to shift the focus of his eyes, perhaps, or change his position, in order to call up a view of either the one or the other. There is clearly no object in spinning this fantasy further; it leads to the inconceivable, or even to absurdities. If we try to represent historical sequence in spatial terms, it can only be done by juxtaposition in space; the same space will not hold two contents. Our attempt seems like an idle game; it has only one justification: it shows us how far away from mastering the idiosyncrasies of mental life we are by treating them in terms of visual representation. There is one objection, though, to which we must pay attention. It questions our choosing in particular the past history of a _city_ to liken to the past of the mind. Even for mental life our assumption that everything past is preserved holds good only on condition that the organ of the mind remains intact and its structure has not been injured by traumas or inflammation. Destructive influences comparable to these morbid agencies are never lacking in the history of any town, even if it has had a less chequered past than Rome, even if, like London, it has hardly ever been pillaged by an enemy. Demolitions and the erection of new buildings in the place of old occur in cities which have had the most peaceful existence; therefore a town is from the outset unsuited for the comparison I have made of it with a mental organism.