<p>A famous portico built by Agrippa’s sister Vipsania Polla in the *Campus Agrippae. It contained Agrippa’s annotated map of the world, which was erected there after his death by Augustus (Pliny, <i>NH</i> 3.17). The fact that an Illyrian army was stationed <i>Vipsania in porticu</i> in A.D. 69 (Tac., <i>Hist.</i> 1.31.2) is evocative of the portico’s great size but tells us little about its architectural form.</p> <p>Many sets of remains have been identified with Polla’s portico, but none has gained universal acceptance. We know only that Martial (4.18.1-2) seems to associate it with the archways of the *Aqua Virgo. The strongest candidate that meets this criteria lies just S of the aqueduct, beneath Galleria Sciarra (Coarelli, <i>LTUR</i>; id. 1995; but cf. De Caprariis). The remains at this site, discovered in 1885, do not permit a reconstruction of the portico’s total dimensions.</p>