The last historical mention we possess of this admirable Egyptian museum of ancient Rome was found by Delille in the "Cod. Parisin." 8064, in which the attempt by Nicomachus Flavianus to revive the pagan religion in 394 A. D. is minutely described.[54] The reaction caused by this final outburst of fanaticism must have been fatal to the temple. The masterpieces of the dromos were upset, and otherwise damaged, the faces of the _kynokephaloi_ and the noses and paws of the sphinxes were knocked off, and statues of Pharaohs, gods, priests, dignitaries, and Pastophoroi were hurled from their pedestals, and broken to pieces. When this wholesale destruction took place, the pavement of the temple was still clear of the rubbish and loose soil. The sphinx of Amasis, found June 14, was lying on its left side on the bare pavement; the two apes had fallen on their backs. No attempt, however, was made to overthrow the obelisks, at least the one which I discovered. When the monolith fell, in the eighth or ninth century, the floor of the Iseum was already covered with a bed of rubbish five feet thick. To this fact we owe the wonderful preservation of the obelisk, the soft, muddy condition of the soil having eased the weight of the fall. Students have wondered at the existence, in our time, of such a mine of antiquities in this quarter of the Campus Martius, where it appears as if, in spite of the feverish search for ancient marbles, this spot had escaped the attention of the excavators of the past four or five centuries. It did not escape their attention. The whole area of the Iseum, save a few recesses, has been explored since the Middle Ages, but the search was made to secure marble, which could be burnt into lime, or turned into new shapes. Of what use would porphyry, or granite, or basalt be for such purposes? These materials are useless for the lime-kiln, and too hard to be worked anew, and accordingly they were left alone. In the excavations of 1883 I found the best evidence that such was the case. The obelisk is of granite; its pedestal of white marble. The obelisk escaped destruction, but the pedestal was split, and made ready for the lime-kiln.