Next to these may be classed the column of Phocas[168]. So recently as twenty-four years ago, the whole of its base, and part of the shaft, were buried in the soil; and up to that time, the ingenuity of the learned was severely tried, in the attempt to find for it a name. One thought it a fragment of the Græcostasis; another adjudged it to a temple of Jupiter Custos; and a third urged the claim of Caligula’s bridge. At length, it was thought that, possibly, the column might originally have been isolated, and thus in itself a complete monument; that, consequently, if the earth at its foot were removed, a pedestal might be uncovered with some inscriptions thereon. The Duchess of Devonshire had recourse to this simple expedient, in the year 1813; the base of the column was laid open, and upon it an inscription was found, recording the fact, that a gilt statue was placed on the top of it in the year 608, in honour of the emperor Phocas, by Smaragdus, exarch of Italy. The material of the column is Greek marble, the capital is Corinthian, and the shaft is fluted. The height is forty-six feet, but as it stands upon a pyramid of eleven steps, its elevation is increased about eleven feet. The seventh Basilica stands about two miles from the walls; the church itself is a fine building, restored in 1611; but the portico, of antique marble columns, is of the time of Constantine. Under the church are the openings to very extensive catacombs, originally formed no doubt by the ancient Romans, to procure pozzolana for their buildings; and enlarged by the early Christians, who used them as places of refuge during their persecutions, and as _cemeteries_, one hundred and seventy thousand of them having, it is said, been interred there. The passages are from two to three feet in width, and extend several miles in different directions. A hall of immense size[169] was discovered about the beginning of the last century, concealed under the ruins of its own massive roof. The pillars of _verde antico_ that supported its vaults, the statues that ornamented its niches, and the rich marbles that formed its pavements, were found buried in rubbish, and were immediately carried away by the Farnesian family, the proprietors of the soil, to adorn their palaces and furnish their galleries. This hall is now cleared of its encumbrances, and presents to the eye a vast length of naked wall, and an area covered with weeds. “As we stood contemplating its extent and proportion,” continues Mr. Eustace, “a fox started from an aperture, once a window, at one end, and crossing the open space, scrambled up the ruins at the other, and disappeared in the rubbish. This scene of desolation reminded me of Ossian’s beautiful description:—‘The thistle shook there its lonely head; the moss whistled to the gale; the fox looked out from the windows; the rank grass waved round his head.’”