A A. Walls of brick, dividing the different bays of the gallery.
B B. Arches of construction, to make the brick facing adhere better to the mass of tufa concrete behind it.
C C. A void space from which a pier of travertine has been carried away for building purposes[249].
D D. The great pier of travertine on one of the arches of the corridor of the Flavian Emperors.
THE COLOSSEUM.
PLATE XXI.
VIEW IN THE UPPER PART.
Details.
COLOSSEUM
DETAILS IN UPPER PART