<p>Unlocated ‘River Gate’ (Festus 79: <i>Flumentana porta</i>) in the Republican defenses along the *Tiber, widely agreed to have spanned the street leading to the *Pons Aemilius (Palmer, based on Coarelli; Coarelli 1988, 22-25 with textual sources, 104-5 fig. 20, 241 fig. 50; id., <i>LTUR</i> III; Wiseman 731 with figs.; cautiously, Gesemann 396; contra, Richardson, who assumes without evidence that the Augustan Pons Aemilius had a different orientation from the earlier bridge). Mentioned for events of the year 384 B.C. and the Tiber floods of 193 and 192 B.C., when the quarters around the Porta Flumentana were hit especially hard (Livy 6.20.11, 35.9.3, 35.21.5), was a swathe of land outside the gate, <i>extra portam Flumentanam</i>, which accommodated small houses and workshops (a situation still present for Varro, <i>Rust</i>. 3.2; cf. <i>CIL</i> VI 9208b=<i>ILS</i> 7686). In this part of the “embankment strip” (*Tiberis: Grand Embankment), extending perhaps further downstream, the *Aemiliana (1) district seems to have been situated. As for the more exact location of the Porta Flumentana, the gate is understood to have been monumentalized under Augustus as the *“Fornix Augusti”, a marble arch whose remnants were recorded in the 14th c. on the piazza in front of the Pons Aemilius; our map therefore subsumes the Porta Flumentana under the index number of the better attested “Fornix Augusti”.</p>