What is the eternal city?

With a little Roman history and Latin under your belt, you end up seeing more everywhere….
–Harry Mount, A Vote for Latin.

I completely agree–with a big thank you to Mrs. Robesonand her teaching descendants today, who taught me lingua latina and classical humanities at Lane Technical High School, and introduced me to the depths of world civilizations. Even though when she wrote the above question on one of those fragrant blue ditto-machine sheets, I incorrectly chose c). Jerusalem.