The front elevation of Palazzo Poli highlights the bas-reliefs and statues that frame the Trevi Fountain, emphasizing the connection between architecture and symbolism. The first bas-relief depicts Agrippa overseeing the construction of the Aqua Virgo aqueduct, celebrating the engineering marvel that still feeds the fountain today. The second bas-relief illustrates the discovery of the Aqua Virgo spring, inspired by the legend of its origin. On either side, two allegorical statues stand: Abundance, symbolizing the wealth of water, and Air Salubrity, representing purity and well-being. These decorative elements harmonize with the grandeur of the Trevi Fountain, enriching its symbolic meaning.