founded by Innocent III. as the headquarters of the Trinitarians or Redemptorists, whose mission was to rescue blacks and whites from slavery. The mosaic by Cosmati, A.D. 1260, is the coat of arms of the order. Just beyond is a Gothic arch, part of their buildings. Beyond this the arch spanning the road is the
ARCH OF DOLABELLA AND SILANUS.
Built of travertine, and erected, as the inscription informs us, by the above consuls, A.D. 10. It was used by Nero to support the aqueduct to his reservoir. Here is the hermitage of S. Giovanni di Matha, 1213, who founded the Redemptorists.
Through the arch on the left is the entrance to
THE VILLA CŒLIMONTANA,
the residence of Baron Hoffmann, who kindly admits visitors on their leaving their cards at the iron gate. Many fragments of antiquity are spread about the grounds, from which there are some fine views. Remains have been found of a Roman fire-station of the fifth cohort of Vigili, whose names are on the pedestals dedicated by them to Marcus Aurelius.
THE OBELISK
was erected by Duke Mattei, but only a very small part of it is Egyptian. The fragment was found in making the present sloping way up to the Capitol, and presented by the magistrates to the duke. It is the only one not re-erected by a pope. It is said that when the architect was directing its elevation, he forgot to take his hand off the pedestal, and that the block was lowered on his hand, which was amputated, the hand being left between the blocks.
At the corner of the grounds, towards the Baths of Caracalla, under a medieval building, is the Fountain of Egeria. (See [page 275].)
Opposite the entrance to the villa is the