[176] The plan of one section of this enormous building (see No. 183 and Plate [XIV.]), and those of the six different floors or storeys, shew the admirable arrangement of the seats and passages, and vomitoria for the rapid exit of the people, as well as the plan of the whole building would do. The magnificent stone arcades of the Flavian Emperors, A.D. 80, appear in many parts to be built against brick walls and galleries of the time of Nero, originally built for the spectators of the old Naumachia. (See No. 3205, 1762.)
[177] The amphitheatre is 1,837 Roman feet in circuit, 638 long, 535 wide, and 165 high from the ground, besides 21 feet for the substructures, so that the whole height was 186 feet. The Roman foot is not quite so long as the English foot, but the difference is trifling. The number of spectators was 87,000 according to the Regionary Catalogue; modern authorities say that the measurement shews this number to be rather exaggerated.
[178] See Nos. 1081, 1762.
[179] See No. 1346.
[180] A coin of Titus shews a colonnade, and one of Domitian also. See Plate [XXV.]
[182] See No. 1761.
[183] See Nos. 1758, 1759, 1760, 1763.
[184] They are more clearly shewn in another photograph, No. 827.
[185] See No. 367.