Note 518 — CANTO THE FOURTH[375]

The castle of St. Angelo. (See Historical Illustrations.)

[Hadrian's mole or mausoleum, now the Castle of St. Angelo, is situated on the banks of the Tiber, on the site of the "Horti Neronis." "It is composed of a square basement, each side of which measures 247 feet.... A grand circular mole, nearly 1000 feet in circumference, stands on the square basement," and, originally, "supported in its turn a cone of earth covered with evergreens, like the mausoleum of Augustus." A spiral way led to a central chamber in the interior of the mole, which contained, presumably, the porphyry sarcophagus in which Antoninus Pius deposited the ashes of Hadrian, and the tomb of the Antonines. Honorius (A.D. 428) was probably the first to convert the mausoleum into a fortress. The bronze statue of the Destroying Angel, which is placed on the summit, dates from 1740, and is the successor to five earlier statues, of which the first was erected in 1453. The conception and execution of the Moles Hadriana are entirely Roman, and, except in size and solidity, it is in no sense a mimic pyramid.—Ruins and Excavations, etc., by R. Lanciani, 1897, p. 554, sq.]