Until about 150 B.C. all the buildings of Rome were constructed either of brick or the local stone; and though we hear nothing of architecture as a fine art, we cannot hesitate to admit that during this period the Romans carried the art of construction, and especially that of employing materials of small dimensions and readily obtainable, in buildings of great size, to a remarkable pitch of perfection. It was not till after the fall of Carthage and the destruction of Corinth, when Greece became a Roman province under the name of Achaia--both which events occurred in the year 146 B.C.--that Rome became desirous of emulating, to a certain extent, the older civilisation which she had destroyed; and about this time she became so enormously wealthy that vast sums of money were expended, both publicly and privately, in the erection of monuments, many of which remain to the present day, more or less altered. The first marble temple in Rome was built by the Consul Q. Metellus Macedonicus, who died B.C. 115. Roman architecture from this period began to show a wonderful diversity in the objects to which it was directed,--a circumstance perhaps as interesting as its great scientific and structural advance upon all preceding styles. In the earlier styles temples, tombs, and palaces were the only buildings deemed worthy of architectural treatment; but under the Romans baths, theatres, amphitheatres, basilicas, aqueducts, triumphal arches, &c., were carried out just as elaborately as the temples of the gods. It was under the Emperors that the full magnificence of Roman architectural display was reached. The famous boast of Augustus, that he found Rome of brick and left her of marble, gives expression in a few words to what was the great feature of his reign. Succeeding emperors lavished vast sums on buildings and public works of all kinds; and thus it comes to pass that though the most destructive of all agencies, hostile invasions, conflagrations, and long periods of neglect, have each in turn done their utmost to destroy the vestiges of Imperial Rome, there still remain fragments, and in one or two instances whole monuments, enough to make Rome, after Athens, the richest store of classic architectural antiquities in the world. But it was not in Rome only that great buildings were erected. The whole known civilised world was under Roman dominion, and wherever a centre of government or even a flourishing town existed there sprang up the residences of the dominant race, and their places of business, public worship, and public amusement. Consequently, we find in our own country, and in France, Spain, Germany, Italy, North Africa, and Egypt--in short, in all the countries where Roman rule was established--examples of temples, amphitheatres, theatres, triumphal arches, and dwelling-houses, some of them of great interest and occasionally in admirable preservation. FOOTNOTE: