The high ground on which the villa stands rises between two valleys, which may be called from their position the north and south valleys. They run down into the plain through which the Anio cuts its bed. The northern valley has been artificially altered, with the view of increasing its picturesque appearance, by cutting the sides so as form perpendicular cliffs of reddish stone. The tints of these rocks, the soft verdure of the plants and trees which grow luxuriantly upon them, the bright colours of the wild flowers scattered here and there, and the lovely hills which rise as a screen behind them, give this valley such a character of soothing and enchanting retirement and beauty, that it has been universally regarded as the spot to which the name of the Vale of Tempe was given by the emperor. The southern valley is less deep and bold, and from its monotonous and severe aspect it may perhaps have been the spot where Hadrian placed his imitation of the infernal regions.[157]
The brook which runs at the bottom of the northern valley (Fosso dell’ Acqua Ferrata) has received the name of the Peneius from antiquaries, and that in the southern valley is called Fosso di Risicoli by the modern inhabitants. These streams are now very scantily supplied with water, but in ancient times, when the villa was watered by a constant flow from its aqueducts, they must have been of considerable volume. The ruins, now overgrown with clumps of cypress and other trees, extend for a space of seven miles in circumference, and in the middle ages were known as Tivoli Vecchio, from a vague and unfounded idea that the ancient city of Tibur stood here. It has been remarked that the Coliseum is strikingly characteristic of the Flavian emperors who planned and executed it, and with equal truth it may be said that the Tiburtinum of Hadrian gives a marvellous picture of the many-sided genius of the great man who was at once the ruler of the whole known world and had travelled throughout his vast domains from Britain to the Euphrates, organising and controlling everywhere, and at the same time showing an appreciation of and value for literature, philosophy, and the fine arts, which was generally foreign to the Roman character. Hadrian constructed in his villa at Tibur a panorama of all the sights which had struck him most in his world-wide travels, in order that he might in this realm of enchantment, when no longer able to travel, have the sights and thoughts in which he had taken such pleasure, revived for his imagination to feed upon. Considering the size and magnificence of the place, which almost resembles a town in its vast extent, it is surprising that so few notices of it should be found among the Roman historians and biographers. Dion Cassius, or rather his epitomiser Xiphilinus, does not even mention it, and Spartianus and Aurelius Victor pass it over without such special remark as we should expect. As, however, a great part of the building consisted of the familiar Thermæ, stadia, theatres and gymnasium, which were constructed in every large Roman villa, they were perhaps not noticed, as matters of course, and only the peculiarities of the villa were recorded. After Hadrian’s return to Rome at the end of his last journey to the East in A.D. 135, he resigned the care of the empire to Lucius Ælius Verus and retired to this villa, which had probably been built during his absence, and may have been begun in 125 when he returned to Rome from his first journey, and finished during the last three years of his life from 135 to 138.
This opinion as to the date at which the villa was built is confirmed by the stamps found on the bricks, which range from the year 123 to the year A.D. 137, and that the ruins belong to Hadrian’s villa is sufficiently attested by universal tradition, and by the number of statues of Antinous, and other works of art found here unquestionably belonging to the reign of Hadrian.
The ruins contain specimens of almost every kind of construction. The most ancient part is a wall of opus incertum, composed of small polygonal fragments of tufa, which stands near the Casino Fede. This wall is probably a remnant of some older villa rustica or farmhouse which occupied the site before Hadrian’s time, and may have belonged to the gens Ælia. It apparently belongs to the first half of the first century B.C. The most common mode of construction is opus reticulatum, with squares of tawny coloured tufa cut in the valley adjoining and bonded at the corners with blocks of the same rock, or with red bricks. In those parts of the buildings, which require great durability from being exposed to the action of water, brickwork is used throughout. The Greek theatre and parts of the academy are built of small squared blocks of tufa, or in some cases of irregular fragments of tufa resembling the later opera Saracenesca. These are sometimes strengthened with bands of reticulated work. In most cases the outer covering of the walls has been removed, especially where it consisted of marble slabs. Some of the stucco ornaments are still very beautiful and well preserved.
Each part of the buildings is complete in itself, but they do not seem to have been arranged on any general plan, and now that the roads which conducted from one part to another have disappeared, they present a confused mass which requires some careful attention to unravel. I have been obliged to confine myself to a very general and cursory account of each main feature. To notice every detail would be far beyond the compass of this book. In Ligorio’s plan 334 different parts of the villa are marked and separately described, and he spent a year in his investigation of the ruins.
Spartianus gives us the names of the Lyceum, the Academy, the Prytaneum, the Canopus, the Pœcile, the Tempe and the Inferi as the parts of the villa made by Hadrian in imitation of their foreign originals. To these Ligorio has added the name Cynosarges found upon a brick stamp. The sites of the Canopus, the Pœcile, the Academy, Tempe, and the Inferi may be said to be ascertained with tolerable certainty, but those of the Lyceum and Prytaneum have not been discovered.
The other names given by antiquarians to the different buildings are generally founded upon some definite evidence drawn from their shape and situation, and are probably upon the whole fairly applicable. They are the Theatres, the Palæstra, the Nymphæum, the Library, the Imperial Palace, the Hospitals, the Stadium, the Camp, and the Thermæ.
Proceeding from north to south, the ruins may be divided, for the convenience of description, into ten grand groups—A, the Palæstra, including the Greek and Latin Theatres and the Nymphæum; B, the Pœcile; C, the Guards’ Barracks; D, the Library; E, the Imperial Palace; F, the Stadium; G, the Thermæ; H, the Canopus; I, the Academy, including the third theatre or Odeum; K, the Inferi. In giving these general divisions, some attempt is made to represent the parts of the villa as they were in Hadrian’s time. The ruins are in such different states of preservation—some being entirely destroyed and the ground-plan barely traceable, while others are almost entire—that their real relative importance is completely obscured. The modern alleys and walks also create much confusion, and render the recognition of the ancient arrangement much more difficult.
The ancient grand entrance to the grounds was at the north-western end of the ruins, on the road towards Tibur, about a quarter of a mile beyond the Ponte Lucano. It seems to have consisted of two large pedestals of white marble, between which the carriage-road passed, and which were pierced with arched passages for the footways on each side. One of these is still traceable in the Vigna Gentili, and has the remains of a bas-relief upon it, while the other has been destroyed, and its corresponding bas-relief placed in the Villa Albani at Rome. This gateway has been imitated by the architect of the gateway at the old Villa Borghese. It is erroneously called a tomb by Piranesi and Ligorio (see Piranesi, Ant. Rom. tom. ii. tav. 39.)
The modern entrance to the ruins is at the gate of the Villa Braschi, and leads, through an avenue of cypress-trees, in a direction at right angles to the ancient road of approach. The avenue runs across a space which was formerly a large quadrilateral court, 350 feet by 250 feet, surrounded with porticoes, attached to the theatre which stands a little to the side at the end of the avenue. The ancient road from the Ponte Lucano entered this court at the northern angle. The porticoes have now nearly disappeared, but part of them was remaining in Ligorio’s time. They served the same purposes as the great colonnades behind the Theatres of Pompey and Balbus at Rome. The theatre is an oval building, sunk in the slope of the rising ground, the southern side containing the seats for spectators, and the northern being occupied by the orchestra and scena, which has a stage in the form of a long and narrow parallelogram. The plan corresponds exactly to the description by Vitruvius of a Greek theatre, and has, therefore, been called the Greek Theatre by the antiquaries. The Greeks had the orchestra wider and the actual stage much narrower than the Latins. Fragments of the travertine substructions of the scena still remain.