A B C. Line of the Section.
a. Colosseum.
b. Claudium.
c. Arch of Dolabella.
d. Reservoir and Spring of water.
e. Aqueduct of Nero.
f. Cave-reservoir and Spring, with ten wells down into it, erroneously called a vivarium.
g g g. Porticus of the Claudium.
h. Church of SS. John and Paul.
i. —— S. John of Mata.