Answer
Vipsania Polla's colonnade, located in the Campus Martius, housed Agrippa's chart, a renowned marble map of the Roman Empire. The chart, commissioned by Marcus Agrippa, Augustus's son-in-law, depicted the empire's vast territories, provinces, and major cities. Its placement in Polla's colonnade, a prominent public space, ensured its accessibility to scholars, travelers, and citizens alike, serving as a valuable resource for understanding the Roman world.