<p>Valley between the *Caelian and *Aventine, extending from the saddle of the *Porta Capena over the better part of the *Via Appia’s first mile (as our map shows; cf. Coarelli). Forming a major topographical element in the Augustan regions <i>I</i> and <i>XII</i> (map: Palombi fig. 84), with the Via Appia as the determining axis for numbering the Augustan *Regiones Quattuordecim, the valley may have coincided, in part or in its entirety, with the <i>vallis Egeriae</i> mentioned by Juvenal (3.17; cf. *Camenae). Yet this name may not have been a formal one, and it is uncertain whether it was in use during the Augustan era. Also unresolved is whether the name ‘Camenae’ — listed as a locality in the late-antique Regionary Catalogues — ever comprised the entire valley between Caelian and Aventine, as claimed by Richardson (63). At present, it seems best to coin the term “Via Appia Valley” for this topographical unit, while not excluding its possible identity with the <i>vallis Egeriae</i> (cf. Platner–Ashby). For an overview of the valley’s sites and monuments, see *Via Appia.</p>