was 620 ft. long and 513 wide, and the height was about 162 ft. It was situated in the hollow between the Esquiline and Cælian hills. The ranges of seats were admirably planned so as to enable all the audience to have a view of what was going on in the arena, and great skill was shown both in the arrangement of the approaches to the different tiers and in the structural means for supporting the seats, and double corridors ran completely round the building on each floor, affording ready means of exit. Various estimates have been made of the number of spectators that could be accommodated, and these range from 50,000 to 100,000, but probably 80,000 was the maximum. Recent excavations have brought to light the communications which existed between the arena and the dens where the wild animals and human slaves and prisoners were confined, and some of the water channels used when mimic sea-fights were exhibited. The external façade is composed of four stories, separated by entablatures that run completely round the building without a break. The three lower stories consist of a series of semicircular arched openings, eighty in number, separated by piers with attached columns in front of them, the Doric order being used in the lowest story, the Ionic in the second, and the Corinthian in the third; the piers and columns are elevated on stylobates; the entablatures have a comparatively slight projection, and there are no projecting keystones in the arches. In the lowest range these openings are 13 ft. 4 in. wide, except the four which are at the ends of the two axes of the ellipse, and these are 14 ft. 6 in. wide. The diameter of the columns is 2 ft. 8¾ in. The topmost story, which is considerably more lofty than either of the lower ones, was a nearly solid wall enriched by Corinthian pilasters. In this story occur two tiers of small square openings in the alternate spaces between the pilasters. These openings are placed accurately over the centres of the arches of the lower stories. Immediately above the higher range of square openings are a series of corbels—three between each pair of pilasters—which probably received the ends of the poles carrying the huge awning which protected the spectators from the sun’s rays. The whole is surmounted by a heavy cornice, in which, at intervals immediately over each corbel, are worked square mortise holes, forming sockets through which the poles of the awning passed. The stone of which the façade of the Colosseum is built is a local stone, called travertine, the blocks of which are secured by iron cramps without cement. Nearly all the internal portion of the building is of brick, and the floors of the corridors, &c., are paved with flat bricks covered with hard stucco. These amphitheatres were occasionally the scene of imitations of marine conflicts, when the arena was flooded with water and mimic vessels of war engaged each other. Very complete arrangements were made, by means of small aqueducts, for leading the water into the arena and for carrying it off.

Apart from theatrical representations and gladiatorial combats, the Romans had an inordinate passion for chariot races. For those the circi were constructed, of which class of buildings the Circus Maximus was the largest. This, originally laid out by Tarquinius Priscus, was reconstructed on a larger scale by Julius Cæsar. It was circular at one end and rectangular at the other, at which was the entrance. On both sides of the entrance were a number of small arched chambers, called carceres, from which the chariots started. The course was divided down the centre by a low wall, called the spina, which was adorned with various sculptures. The seats rose in a series of covered porticoes all round the course, except at the entrance. As the length of the Circus Maximus was nearly 700 yards, and the breadth about 135 yards, it is possible that Dionysius may not have formed an exaggerated notion of its capacity when he says it would accommodate 150,000 spectators.

In the Roman provinces amphitheatres were often erected; and at Pola in Istria, Verona in Italy, and Nîmes and Arles in France, fine examples remain. A rude Roman amphitheatre, with seats cut in the turf of a hill-side, exists to this day at the old town of Dorchester in Dorset, which was anciently a Roman settlement.

Baths (Thermæ).

Nothing can give us a more impressive idea of the grandeur and lavish display of Imperial Rome than the remains of the huge Thermæ, or bathing establishments, which still exist. Between the years 10 A.D., when Agrippa built the first public baths, and 324 A.D., when those of Constantine were erected, no less than twelve of these vast establishments were erected by various emperors, and bequeathed to the people. Of the whole number, the baths of Caracalla and of Diocletian are the only ones which remain in any state of preservation, and these were probably the most extensive and magnificent of all. All these splendid buildings were really nothing more than bribes to secure the favour of the populace; for it seems quite clear that the public had practically free entrance to them, the only charge mentioned by writers of the time being a quadrans, about a farthing of our money. Gibbon says, “The meanest Roman could purchase with a small copper coin the daily enjoyment of a scene of pomp and luxury which might excite the envy of the kings of Asia.” And this language is not exaggerated. Not only were there private bath-rooms, swimming-baths, hot baths, vapour-baths, and, in fact, all the appurtenances of the most approved Turkish baths of modern times, but there were also gymnasia, halls for various games, lecture-halls, libraries, and theatres in connection with the baths, all lavishly ornamented with the finest paintings and sculpture that could be obtained. Stone seems to have been but sparingly used in the construction of these buildings, which were almost entirely of brick faced with stucco: this served as the ground for an elaborate series of fresco paintings.

Fig. 133.—Plan of the Principal Building, Baths of Caracalla, Rome.]

The baths of Caracalla, at the foot of the Aventine hill, erected A.D. 217, comprised a quadrangular block of buildings of about 1150 ft. (about the fifth of a mile) each way. The side facing the street consisted of a portico the whole length of the façade, behind which were numerous ranges of private bath-rooms. The side and rear blocks contained numerous halls and porticoes, the precise object of which it is now very difficult to ascertain. As Byron says:

“Temples, baths, or halls?
Pronounce who can.”