We will now leave the Trastevere, and pass over the Bridge of Cestius, now of St. Bartholomew, into the island, which is also dedicated to that saint; considerable vestiges of the ancient bridge remain. It was built in the 788th year of Rome, but restored in 368 of the Christian era. In a convent in the island, we find a waxen bust of one of the monks, who was a friend of Canova, made by that artist. It is admirably executed, and coloured like nature, but the stillness of the open blue eyes represents death, and not life. In the garden of the same convent, and from the shore just below it, you may see the small remnants of the temple of Æsculapius, which was built in the form of a ship. Something of this shape is still distinguishable, and also a portion of the serpent. The temple of Vesta, the mouth of the Cloaca maxima, and Ponte Rotto, unite into a fine composition, as seen from the point of the island. After crossing the other branch of the Tiber, on the Ponte di Quattro Capi, which retains in its piers some fragments of the Pons Fabricius, built in 733 of Rome; we may visit the Palazzo Mattei, which I notice, not for its architecture, nor for its paintings, though it contains a fine collection, but for the great quantity of bas-reliefs, built up in the walls. They would make an interesting museum, if put together in a place where they were well seen; but here, besides being exposed to the injuries of the weather, they are almost lost as separate objects, and they take away from what beauty there is in the architecture. In the lower court are some valuable fragments of architectural ornament, built up in the same manner, and in particular, two semicircular windows, where the rich foliage which occupies great part of the opening, shews that the ancients knew how to produce an effect, somewhat similar to that of the tracery in our Gothic windows, and in some respects superior to it, without at all departing from the character of their own architecture. I have not mentioned the Church of San Carlo a’ Catinari, which however is a fine church, in the form of a Greek cross, or rather a Latin cross reversed, for the choir forms a longer arm than the others, and even these, being nearly equal to the width of the dome, are rather too deep. The gilding and ornament is spotty, but the frescos of Domenichino are very good, not equal however, to those at Sant Andrea.