ruins of the baths of Constantine and those of the temple of Sol.  The Aldobrandini palace contains the proudest monument of ancient painting—­the Aldobrandine Wedding, a fresco purchased by Pius VII., in 1818, in which the design is admirable.  The great Farnese palace, begun from the designs of Sangallo, and completed under the direction of Michael Angelo, is celebrated both for its beauty and its treasures of art.  The Caracci and Domenichino have immortalized themselves by their frescos in its gallery.  The Farnese Hercules, the masterly Flora, and the urn of Caecilia Metella, formerly adorned the court; and in the palace itself was the beautiful group of the Farnese bull.  But when the king of Naples inherited the Farnese estate, these statues, with other works of art, were carried to Naples, where they now adorn the palace degli Studi.  Not far off is the palace Corsini, where queen Christina lived and died in 1689.  It contains a valuable library and gallery.  The palace Giustiniani also had a gallery adorned with numerous valuable statues and works of sculpture; its principal ornaments were the celebrated statue of Minerva, the finest of that goddess now known, and the bas-relief of Amalthaea suckling Jupiter.  These treasures were nominally bought by Napoleon, and are now in Paris.  The paintings are chiefly in the possession of the king of Prussia.  In the palace Spada is the statue of Pompey, at the foot of which Caesar fell under the daggers of his murderers.  We have yet to mention the palace Costaguti, on account of its fine frescos; Chigi, for its beautiful architecture, its paintings and library; Mattei, for its numerous statues, reliefs, and ancient inscriptions; the palace of Pamfili, built by Borromini, for its splendid paintings and internal magnificence; that of Pamfili in the square of Navona, with a library and gallery; Rospigliosi, upon the Quirinal hill, etc.  Among the palaces of Rome, which bear the name of villas, is the Villa Medici, on the Pincian mount, on which were formerly situated the splendid gardens of Lucullus:  it once contained a vast number of masterpieces of every kind; but the grand dukes Leopold and Ferdinand have removed the finest works (among them, the group of Niobe, by Scopas) to Florence.  This palace, however, is yet worthy of being visited.  Under the portico of the Villa Negroni are the two fine statues of Sylla and Marius, seated on the sella curulis.  In the extensive garden, which is three miles in circuit, some beautiful fresco paintings have been found in the ruins of some of the houses.  The Villa Mattei, on the Coelian mount, contains a splendid collection of statues.  The Villa Ludovisi, on the Pincian mount, not far from the ruins of the circus and the gardens of Sallust, is one and a half miles in circuit, and contains valuable monuments of art, particularly the Aurora of Guercino, an ancient group of the senator Papirius and his mother (or rather of Phaedra and Hippolytus), another of Arria and Paetus,