Immediately opposite the bridge, stands the Mausoleum of Hadrian. Augustus built his sepulchre for himself and his family, including servants and dependents, and a large building, if not a sumptuous one, seems necessary for such a purpose. Hadrian is supposed to have built his, with all the selfishness of despotism, for himself alone. Hadrian shall never be my hero; he had no high and generous feeling; yet even he, in his immense villa at Tivoli, had some view towards his fellow-creatures, their wants and welfare. Enough remained of the spirit of liberty to convince him, that his glory was intimately connected with their use and advantage, while Louis XIV. at Versailles, seems to have had all his thoughts begin and end in himself. What remains of this vast burying-place consists of a basement 253 feet square, with a circular tower in the centre, about 192 feet in diameter. This circular part is now a mere mass, but it is said to have been highly adorned with marbles and statues, and surrounded with a magnificent circle of the beautiful columns which are still shown in the church of St. Paul. Notwithstanding this evidence the fact is very doubtful. St. Gregory saw an angel on the top of this Mausoleum, in the year 593, and from that, the building has obtained the name of Castello di Sant Angelo. Perhaps it would be more correct to say, that the name is derived from the figure of an angel in bronze, commemorative of the event or of the tradition, which now majestically crowns the edifice. This statue was not erected till the time of Benedict XIV., but it was preceded by one executed in marble by Raffaello di monte Lupo. From this castle are exhibited the famous fireworks of the 28th and 29th June, the feasts of St. Peter and St. Paul, originally designed by Michael Angelo. The first flight of rockets is 4,500, and it forms a complete canopy of fire. The exhibition is over in an hour, and does not linger through half the night. In exhibitions of this sort, and in the lengthened entertainments at theatres and balls, it seems as if there were something in the English character which impels us to drain the cup of pleasure to the dregs.