Built from 1732 to 1762 on the facade of Palazzo Poli, passed from the hands of Nicola Salvi to Pietro Bracci. The view of the fountain is impressive with the statue of Poseidon to the minor details of the rocks. It is said that if you toss a coin inside, your wish will come true. It was restored in 2015 thanks to FENDI Roma funding, to contribute to the growth of this city's tourism sector. Every year almost 2 million euros in coins are collected from the fountain, which are then sorted and donated to various charitable foundations, or for social projects.