It is surprising how many first impressions of the sight of Rome have been put on record. Some of these first impressions are unashamedly imaginary and come to us mediated by or through a persona. This is a common ploy in Augustan poetry, and it is worth remembering that none of the great Augustan poets was a Roman of Rome, so the impressions attributed to the persona may well reflect those of the writer on his first coming to the metropolis as a young man or boy. First impressions can be conveniently divided into two groups. Some are just that, first impressions, with no hint that the visitor might have had some expectations of what would be seen and experienced. A second group, perhaps the more interesting one, distinguishes itself by a shared anticipation: their actual impressions on visiting the city are not really ‘first’ impressions at all. Few have ever brought to Rome an innocent eye: even in antiquity many visitors always already seemed to know what they were going to see there. Considered chronologically, the very first impressions of Rome of this second group were formed in the imagination, by hearsay, by reading, or in modern times by seeing images of the city: theirs is a virtual Rome. When they finally visit the ‘real’ Rome there often occurs a disjunction or contrast; it might be of enhancement.