A stranger's first lesson in Roman geography should be learnt standing in the _Piazza del Popolo_, whence three streets branch off--the Corso, in the centre, leading towards the Capitol, beyond which lies ancient Rome; the Babuino, on the left, leading to the Piazza di Spagna and the English quarter; the Ripetta, on the right, leading to the Castle of St. Angelo and St. Peter's. The scene is one well known from pictures and engravings. The space between the streets is occupied by twin churches, erected by Cardinal Gastaldi. "Les deux églises élevées au Place du Peuple par le Cardinal Gastaldi à l'entrée du Corso, sont d'un effet médiocre. Comment un cardinal n'a-t-il pas senti qu'il ne faut pas élever une église pour _faire pendant_ à quelque chose? C'est ravaler la majesté divine." _Stendhal_, i. 172. It is in the church on the left that sermons are preached every winter on Sunday afternoons by some of the best Roman Catholic controversialists, just at the right moment for catching the Protestant congregations as they emerge from their chapels outside the Porta del Popolo. These churches are believed to occupy the site of the magnificent tomb of Sylla, who died at Puteoli B.C. 82, but was honoured at Rome with a public funeral, at which the patrician ladies burnt masses of incense and perfumes on his funeral pyre. The _Obelisk_ of the Piazza del Popolo was placed on this site by Sixtus V. in 1589, but was originally brought to Rome and erected in honour of Apollo by the Emperor Augustus. "Apollo was the patron of the spot which had given a name to the great victory of Actium; Apollo himself, it was proclaimed, had fought for Rome and for Octavius on that auspicious day; the same Apollo, the Sun-god, had shuddered in his bright career at the murder of the Dictator, and terrified the nations by the eclipse of his divine countenance." ... Therefore, "besides building a temple to Apollo on the Palatine hill, the Emperor Augustus sought to honour him by transplanting to the Circus Maximus, the sports of which were under his special protection, an obelisk from Heliopolis, in Egypt. This flame-shaped column was a symbol of the sun, and originally bore a blazing orb upon its summit. It is interesting to trace an intelligible motive for the first introduction into Europe of these grotesque and unsightly monuments of eastern superstition."--_Merivale, Hist. of the Romans._