AMPHĬTHĔĀTRUM, an amphitheatre, was a place for the exhibition of public shows of combatants, wild beasts, and naval engagements, and was entirely surrounded with seats for the spectators; whereas, in those for dramatic performances, the seats were arranged in a semicircle facing the stage. An amphitheatre is therefore frequently described as a double theatre, consisting of two such semicircles, or halves, joined together, the spaces allotted to their orchestras becoming the inner inclosure, or area, termed the _arena_. The form, however, of the ancient amphitheatres was not a circle, but invariably an ellipse. Gladiatorial shows and combats of wild beasts (_venationes_) were first exhibited in the forum and the circus; and it appears that the ancient custom was still preserved till the time of Julius Caesar. The first building in the form of an amphitheatre is said to have been erected by C. Scribonius Curio, one of Caesar’s partisans; but the account which is given of this building sounds rather fabulous. It is said to have consisted of two wooden theatres, made to revolve on pivots, in such a manner that they could, by means of windlasses and machinery, be turned round face to face, so as to form one building. Soon after Caesar himself erected, in the Campus Martius, a stationary amphitheatre, made of wood; to which building the name of _amphitheatrum_ was for the first time given. The first stone amphitheatre was built by Statilius Taurus, in the Campus Martius, at the desire of Augustus. This was the only stone amphitheatre at Rome till the time of Vespasian. One was commenced by Caligula, but was not continued by Claudius. The one erected by Nero in the Campus Martius was only a temporary building, made of wood. The amphitheatre of Statilius Taurus was burnt in the fire of Rome in the time of Nero; and hence, as a new one was needed, Vespasian commenced the celebrated _Amphitheatrum Flavium_ in the middle of the city, in the valley between the Caelian, the Esquiline, and the Velia, on the spot originally occupied by the lake or large pond attached to Nero’s palace. Vespasian did not live to finish it. It was dedicated by Titus in A.D. 80, but was not completely finished, till the reign of Domitian. This immense edifice, which is even yet comparatively entire, covered nearly six acres of ground, and was capable of containing about 87,000 spectators. It is called at the present day the _Colosseum_ or _Colisaeum_. The interior of an amphitheatre was divided into three parts, the _arena_, _podium_, and _gradus_. The clear open space in the centre of the amphitheatre was called the _arena_, because it was covered with sand, or sawdust, to prevent the gladiators from slipping, and to absorb the blood. The size of the arena was not always the same in proportion to the size of the amphitheatre, but its average proportion was one-third of the shorter diameter of the building. The arena was surrounded