Porta Maggiore, entrance for aqueducts

The present Porta Maggiore (NW) with the Aqua Marcia, Tepula and Julia (only square dots from SE to NW) and parallel the Aqua Claudia and Anio Novus (and Felice) partly on the Aurelian Wall. Also visible (W) Nero's branche (Arcus Neroniani), a side branche of the Aqua Claudia to the Palatine (see FUR 31). (R. Lanciani: Forma Urbis Roma 32 Porta Maggiore)