Note 89 — THE FLAVIAN AMPHITHEATRE, COMMONLY CALLED THE COLOSSEUM.

This vivarium is a triangular piece of ground, the wide end of which touches the wall of the Amphitheatrum Castrense; the narrow end is only just wide enough for the body of a man to pass through an aperture made in it, as the ground is between a wall of Aurelian on the inner side, and a wall of the Sessorium on the outer side, preserved by Aurelian as an outwork. This was the scene of the celebrated ambuscade of Belisarius, by means of which the Goths were driven away from Rome, as described by Procopius (De Bello Gothico, lib. i. c. 22.)