Domitian’s obelisk, also styled the Pamphilian Obelisk, and the Obelisk of the Piazza Navona, in Rome, is erected on a base of rock, forty feet high, in the midst of a fountain, and is ornamented at the four corners with statues of river-gods. It is placed in front of the church of St. Agnes, and is supposed to occupy the spot where that saint suffered her martyrdom. The height of the obelisk is 54 feet 3 inches, and its breadth at the base 4 feet 5 inches. It was set up in its present place by Bernini, in 1651, at the command of Pope Innocent X. Domitian and Titus are represented in cartouches on a small obelisk of red granite, a little more than nine feet high, which stands in the Cathedral Square of Benevento. It is carved with several columns of hieroglyphs, but is much mutilated. The inscription records the dedication of a temple to the goddess Isis by the two emperors.[52] Mr. Cooper, however, takes no notice of a shorter fragment of an obelisk at Benevento, which is set down by Bonomi in his list of erect obelisks. [52] Cooper. Hadrian and Sabina are commemorated by an obelisk of red granite, thirty feet in height, which now stands on the Monte Pincio at Rome. It is one of a pair originally planted in front of a temple in the Egyptian city of Antinoopolis, A.D. 131; and records the sacrifice of Antinous, the celebrated favourite of Hadrian. A few years later it was removed to Rome, and erected on the Monte Pincio, where it shared the fate of the rest of the Roman obelisks, thrown down and buried; until, in 1822, it was recovered and set up by Pope Pius VII. “After the erection of this last obelisk,” says Mr. Cooper, “no more inscribed obelisks were set up, either in Egypt or in Rome. For this there was ample reason: the Egyptian language had been entirely supplanted by the Latin and the Greek; the significance of the characters was unknown; already Pliny had proved his entire ignorance of the script; and Pliny, it must be recollected, was the learned centre of all the science of his time.” Among the obelisks of obscure origin, are a small sandstone monolith, without inscription, in the possession of the Duke of Northumberland, and preserved in the museum at Alnwick Castle; two small obelisks in the museum at Florence; and the obelisk of the city of Arles, on the Rhone. The two obelisks in the Florentine Museum are only 5 feet 10 inches, and 6 feet high, but differ in breadth, and are the smallest of the obelisk family. They are fashioned of red granite, the pyramidion perfect; but being uninscribed, their authorship and origin are unknown. [Illustration: Obelisk at Arles.]