Note 9 — Chapter I

Urns, or, as the Italians called them, ‘conche,’ of porphyry, basalt, granite and marble existed in great abundance in the Roman Thermae where they were used for bathing purposes. From the seventh century onwards the Christians adopted these for sepulchral use and placed them in the churches, where many of them are still to be seen (Lanciani, Storia degli Scavi, Roma, 1902, I, 3, and Marangoni, Delle Cose Gentilesche, etc., Roma, 1744). Hence Vasari speaks of the porphyry urn of the Piazza della Rotonda (the Pantheon) as of sepulchral origin, and it was indeed rumoured to have held the ashes of Agrippa, and to have stood once on the apex of the pediment of the Pantheon portico. It was however an ancient bath vessel, and was found when Eugenius IV, 1431–39, first excavated and paved the piazza in front of the Pantheon. It was placed with two Egyptian lions in front of the portico, where it may be seen in the view of the Piazza della Rotonda in G. F. Falda’s Vedute delle Fabbriche, etc., of 1665. Clement XII, 1730–40, who was a Corsini, had it transported for his own sepulchre to the Corsini chapel in the Lateran, where it now stands, with a modern cover. Vasari evidently admired this urn, and he mentions it again in the life of Antonio Rossellino, where he says of the sarcophagus of the monument of the Cardinal of Portugal in S. Miniato, ‘La cassa tiene il garbo di quella di porfido che è in Roma sulla piazza della Ritonda.’ (Opere, ed. Milanesi, III, 95.) See Lanciani, Il Pantheon, etc., Prima Relazione, Roma, 1882, p. 15, where the older authorities are quoted. Of all the bath vases of this kind now visible in Rome, the finest known to the writers is the urn of green porphyry, a rare and beautiful stone, behind the high altar of S. Nicola in Carcere. It is nearly six ft. long, and on each side has two Medusa heads in relief worked in the same piece, with the usual lion’s head on one side at the bottom for egress of water. The workmanship is superb. It may be noted that the existing baptismal font in St. Peter’s, in the first chapel on the left on entering, is the cover of the porphyry sarcophagus of Hadrian turned upside down. It measures 13 ft. in length by 6 ft. in width.