<p>A shrine to Fons built from Corsican spoils was dedicated by Papirius Maso, probably in 221 B.C. (Cic., <i>Nat. D.</i> 3.52: <i>Fontis delubrum</i>). There are no known remains, but on the basis of a fragment of the <i>fasti viae Ardeatinae</i> (Degrassi, <i>Inscr. Ital.</i> 13.2, 154) it is agreed to have stood outside the *Porta Fontinalis, probably on the saddle between the *Arx and the *Quirinal next to the *Via Flaminia (Aronen, cf. Richardson).</p>