Note 46 — BOOK XV.

The Nymphæum was a temple sacred to the Nymphs, deriving its name of Septemzodium, or Septizonium (which it shared with more than one other building at Rome), from the seven rows of pillars, one above the other, and each row lessening both in circuit and in height, with which the exterior was embellished. Another temple of this kind was built by Septimius Severus.