There are three or four obelisks that mark the introduction of the Egyptian worship of Isis into the imperial city of the later emperors. At one time everything Egyptian was fashionable in Rome, and the goddess of Egypt was domesticated in the Roman Pantheon, and temples in her honour were erected in several parts of the city and throughout the empire. Obelisks, fashioned in Egypt by command of the Romans, were often placed in front of the temples. But these spurious obelisks have little dignity or significance, and suffer wofully when brought into comparison with specimens of the genuine work of old Egypt. The largest and most imposing of these monuments of the new faith of the city is the one that now stands in the Piazza Navona, formerly called the Pamphilian Obelisk, in honour of the family name of Pope Innocent X., who placed it there. It is forty feet high, of red granite, broken into five pieces, and covered with hieroglyphics, the whole style and execution of which are so inferior that Winkelman long ago, although he knew nothing of their import, detected the fact of the obelisk being a mere imitation. It was cut and engraved at Syene by order of the emperor Domitian, who designed it to adorn his villa on the Lake of Albano. From thence it was removed by the usurper Maxentius to the circus on the Appian Way, founded by him, and named after his son Romulus. It is now on the site of the old Circus Agonalis, whose form and boundaries are marked out by the houses of the Piazza Navona. Surmounted by the Pope's device of a dove with an olive branch, a vain substitute of heraldry for sacred symbolism, and standing on an artificial rock-work about forty feet high, composed of figures of Tritons and nymphs, disporting themselves amid plashing fountains and marble foliage, the whole subject is incongruous and utterly opposed to the simplicity and majesty of the ancient monuments.