The portico was added by Marcus Agrippa, the son-in-law of Augustus. It is supported by sixteen pillars of granite, five feet in diameter, and of a single piece each. Upon the frieze, in the front, is the following inscription in large capitals: M. AGRIPPA L. F. CONSUL TERTIUM FECIT. Some are of opinion, that the Pantheon is much more ancient than the Augustan age, and that the portico, which is the only part those antiquarians admit to be the work of Agrippa, though beautiful in itself, does not correspond with the simplicity of the temple. As the Pantheon is the most entire, the Amphitheatre of Vespasian is the most stupendous, monument of antiquity in Rome. It was finished by his son Titus, and obtained the name of Colosseum, afterwards corrupted into Coliseum, from a colossal statue of Apollo which was placed before it. This vast structure was built of Tiburtine stone, which is remarkably durable. If the public buildings of the ancient Romans had met with no more inveterate enemy than Time, we might, at this day, contemplate the greater number in all their original perfection; they were formed for the admiration of much remoter ages than the present. This Amphitheatre in particular might have stood entire for two thousand years to come: For what are the slow corrosions of time, in comparison of the rapid destruction from the fury of Barbarians, the zeal of Bigots, and the avarice of Popes and Cardinals? The first depredation made on this stupendous building, was by the inhabitants of Rome themselves, at that time greater Goths than their conqueror. We are told, they applied to Theodoric, whose court was then at Ravenna, for liberty to take the stones of this Amphitheatre for some public work they were carrying on. The marble cornices, the friezes, and other ornaments of this building, have been carried away, at various times, to adorn palaces; and the stones have been taken to build churches, and sometimes to repair the walls of Rome, the most useless work of all. For of what importance are walls to a city, without a garrison, and whose most powerful artillery affects not the bodies, but only the minds, of men? About one-half of the external circuit still remains, from which, and the ruins of the other parts, a pretty exact idea may be formed of the original structure. By a computation made by Mr. Byres, it could contain eighty-five thousand spectators, making a convenient allowance for each. Fourteen chapels are now erected within side, representing the stages of our Saviour’s passion. This expedient of consecrating them into Christian chapels and churches, has saved some of the finest remains of Heathen magnificence from utter destruction.