too much ruined for us to decide on what they have been; but in the one by the Torre degli Schiavi, which is the most perfect I have seen, enough remains to tell pretty decidedly that there was neither door nor window above or below; and neither fireplace nor staircase, nor are there any niches, either for statues, or for the dead bodies, or for cinerary urns, or any deposit from water. What can this have been? At a little distance is a fragment of another circular building, of the same sort of work, but smaller and more ruinous, and also more buried in its ruins. Enough remains to shew that the dome has been fluted, with a small fillet on the angle of each flute: the flutes have been rounded off in some degree at the bottom. The outside is of reticulated tufo, and seems to have been square. At the distance of a few steps is a building, which is of brick, and octangular below, and of rubble above, the outside covering having disappeared. A tower is built upon part of it, the residence of—I forget who; some noble or robber, names which appear synonymous in the middle ages at Rome. This also is domed. Within are four niches, three recesses, and the door; and we observe here that there have been a circular vault below, and central pier, as in the principal edifice. Some ornaments in relief on the stucco still exist in one of the niches. On one side are some additional buildings, but there has been no door of communication between them and the circular part. There are many other fragments, but these are the most perfect. This group of ruins is sometimes called Roma Vecchia, but there is another Roma Vecchia more considerable, on the Appian way, of which I shall give you some account in my next walk. Returning to Rome, we find a small building of very neat brickwork, somewhat in the style of the temple of Rediculus, of which my next ramble will also contain an account, but in worse taste, and therefore probably later. It has a lofty frieze, adorned with arches, another proof of the decline of the art. LETTER XXXIV. NEIGHBOURHOOD OF ROME. _Rome, May, 1817._