I was carried to see a great virtuoso, Cavaliéro Pozzo, who showed us a rare collection of all kind of antiquities, and a choice library, over which are the effigies of most of our late men of polite literature. He had a great collection of the antique basso-relievos about Rome, which this curious man had caused to be designed in several folios: many fine medals; the stone which Pliny calls Enhydros; it had plainly in it the quantity of half a spoonful of water, of a yellow pebble color, of the bigness of a walnut. A stone paler than an amethyst, which yet he affirmed to be the true carbuncle, and harder than a diamond; it was set in a ring, without foil, or anything at the bottom, so as it was transparent, of a greenish yellow, more lustrous than a diamond. He had very pretty things painted on crimson velvet, designed in black, and shaded and heightened with white, set in frames; also a number of choice designs and drawings.
Hence we walked to the Suburra and Ærarium Saturni, where yet remain some ruins and an inscription. From thence to St. Pietro in vinculis, one of the seven churches on the Esquiline, an old and much-frequented place of great devotion for the relics there, especially the bodies of the seven Maccabean brethren, which lie under the altar. On the wall is a St. Sebastian, of mosaic, after the Greek manner: but what I chiefly regarded was, that noble sepulchre of Pope Julius II., the work of M. Angelo; with that never-sufficiently-to-be-admired statue of Moses, in white marble, and those of Vita Contemplativa and Activa, by the same incomparable hand. To this church belongs a monastery, in the court of whose cloisters grow two tall and very stately palm trees. Behind these, we walked a turn among the Baths of Titus, admiring the strange and prodigious receptacles for water, which the vulgar call the Setti Sali, now all in heaps.[Pg 128]