But it is impossible, within the limits of this chapter, to describe fully the relics of other precious and beautiful stones which may be found among the ruins of ancient Rome, or among the churches to which they have been transferred. Profuse as were the ancient Romans in their general expenditure, upon no objects did they lavish their wealth so extravagantly as upon their favourite marbles and precious stones for the decoration of their public buildings and their private houses. No effort was spared that Rome might be adorned with the richest treasures of the mineral kingdom from all parts of the world. Slaves and criminals were made to minister to this luxury in the various quarries of the Roman dominions, which were the penal settlements of antiquity. The antiquary Ficoroni counted the columns in Rome in the year 1700, and he found no less than eight thousand existing entire; and yet these were but a very small proportion of the number that must once have been there. The palaces and modern churches of Rome owe, as I have said, all their ornaments to this passion of the ancients. There is not a doorstep nor a guardstone at the corner of the meanest court in Rome which is not of marble, granite, or porphyry from some ancient building. Almost all the houses, as Raphael said, have been built with lime made of the costly old marbles. The very streets in the newly-formed parts of the city are macadamised with the fragments of costly baths and pillars. I took up one day, out of curiosity, some of the road-metal near the Church of Santa Maria Maggiore, and I identified in the handful no less than a dozen varieties of the most beautiful marbles and porphyries from Greece, Africa, and Asia. And when we remember that all these foreign stones were brought into Rome during the interval between the end of the Republic and the time of Constantine--a period of between three hundred and four hundred years--we can form some idea of the extraordinary wealth and luxury of the Imperial City when it was in its prime.
Among the numberless objects of interest to be seen in Rome, a very high place must be assigned to the Codex Vaticanus, probably the oldest vellum manuscript in existence, and the richest treasure of the great Vatican Library. This famous manuscript, which Biblical scholars designate by the letter B, contains the oldest copy of the Septuagint, and the first Greek version of the New Testament. In addition to the profound interest which its own intrinsic value has inspired, it has been invested with a halo of romance seldom associated with dry palæographical studies--on account of the unreasonable jealousy and capricious conduct of its guardians. For a long time it was altogether inaccessible for study to Biblical scholars, and few were allowed even to see it. These restrictions, however, have now happily to a considerable extent been removed; and provided with an order, easily obtained from the Vatican librarian, or from the Prefect of the sacred palaces, in reply to a polite note, any respectable person is permitted to inspect it.