Roman historians branded the Julio-Claudian successors of Augustus--Tiberius (A.D. 14–37), Caligula (37–41), Claudius (41–54) and Nero (54–68)--as a hypocrite, a madman, a fool, and a knave. The hypocrite spent millions rehabilitating Asia Minor after an earthquake, the madman provided Ostia with a splendid aqueduct, the fool built for the same city a great artificial harbor, the knave rebuilt Rome--after burning it down first, his enemies said--with a new and intelligent city plan. But it would be easy to interpret the Julio-Claudian age as one of conspicuous consumption and conspicuous waste: there were many who fiddled before Rome ever burned. Thus both Tiberius and Caligula built on the Palatine grandiose palaces, and Nero’s Golden House, as we shall see, outdid them all. Tiberius’ monstrous barracks at the city wall for the praetorian guard introduces a sinister note. Claudius’ Altar of Piety, modelled on Augustus’ Altar of Peace, shows how derivative official art can be. Out of the complexity of this half-century, as archaeology reveals it to us, I have chosen four examples, one from each reign: a stately pleasure-dome of Tiberius by the sea at Sperlonga; a pair of extraordinary houseboats, probably Caligula’s, from the Lake of Nemi; the curious subterranean basilica at the Porta Maggiore in Rome, which flourished briefly and mysteriously in the reign of Claudius; and Nero’s fabulous Golden House. * * * * * In August, 1957, road improvements near Sperlonga, on the coast, about sixty-six miles southeast of Rome, offered G. Iacopi of the Terme Museum the opportunity for partially restoring, and closely examining, the ruins of a well-known villa there, commonly called the Villa of Tiberius. Making soundings near the villa in a wide, lofty cave fronting on the beach (Fig. 7.1), partly filled with sea-water, Iacopi discovered that the natural cave had been made over into a _nymphaeum_ or _vivarium_, a round artificial fish-pool, with a large pedestal for statuary in the middle, and artificial grottoes opening behind (Fig. 7.2). In the pool and the grottoes, buried under masses of fallen rock, Iacopi and his assistants found an enormous quantity--at last accounts over 5500 fragments--of statuary. The fallen rock gave a clue for dating at least one phase of the cave’s existence, and a possible confirmation of the popular name for the adjoining villa. For the historian Tacitus mentions that in A.D. 26, Tiberius, dining in a natural cave at his villa at Spelunca, was saved from being crushed under falling rock by the heroism of his prefect of the praetorian guard, Sejanus, who protected him with his own body. This is very likely the actual cave which Iacopi explored, though his discoveries suggest that there were additions after Tiberius’ time.