or lecture-hall of Mæcenas, the entrance being formed through the agger. It is 24 metres 40 centimetres long, by 10 metres 60 centimetres broad. The wall supporting the roof, in which was the window, is nearly eight metres high. On each side of the hall the walls contain six niches decorated in the Pompeian style. At the farther end of the hall is a sort of tribune composed of seven circular steps in tiers, once faced with marble. From here the author recited. In the circular wall behind these, which forms the end of the hall, are five more niches. The floor is below the surrounding level, probably to keep the building cool during the summer months. Its height was about forty feet. It may be that in this auditorium Virgil read his "Georgics" to Mæcenas, as he says,-- "I sing, Mæcenas, and I sing to thee.... O thou! the better part of my renown, Inspire thy poet, and thy poem crown; Without thee, nothing lofty can I sing." Or Horace, his Odes recited to Mæcenas' praise,-- "You that are both my shield and glory dear." The auditorium now serves as a local museum. It is open every Thursday from 9 till 11 and 3 till 5. _Permissions_ must be obtained at the Archæological Office at the Capitol. _N.B._--Owing to the new quarter of Rome being built here, the roads are very much cut up and changed in this neighbourhood. _Retracing our steps towards the Basilica, turn to the right up the_ VIA S. VITO. _At the corner_ is the Gothic Church of the Holy Redeemer, built by a Mr. Douglas, who went over to the Roman Church. _Up the street is_ THE ARCH OF GALLIENUS, erected in 262 in honour of the emperor, by Marcus Aurelius Victor. It is plain and unadorned, and only the central arch is preserved. _Passing under the arch, turn to the left_, there are some remains of the agger. _Beyond, on the opposite side of the street, is the_ CHURCH OF S. ANTONIO ABBATE, where the animals are blessed on January 17th. The round doorway is the only one of its sort in Rome. _To the right we reach the new Piazza Vittorio Emanuele. On our left is_ THE NYMPHÆUM of Alexander Severus, called the Trophies of Marius. It derives this appellation from the marble trophies formerly placed in the two side niches, and thence transferred to the parapet of the flight of steps leading up to the Capitol. This splendidly decorated reservoir was the nymphæum of the Emperor Alexander Severus, and is represented on a coin. It was to the Aqua Julia what the Trevi Fountain was to the Aqua Virgo. A portion of the aqueduct which supplied the water is still standing. _Just beyond are_ THE TOMBS OF MÆCENAS AND HORACE. The first consists of a sepulchre of rubble work in a circular form, now surmounted by a cottage; the second, near it, is a stable, with two columns in front. Horace was buried near Mæcenas. Suetonius tells us: "He was interred, and lies buried on the skirts of the Esquiline Hill, near the Tomb of Mæcenas."