Fontana dei Quattro Fiumi (Fountain of the Four Rivers) is a fountain in the Piazza Navona in Rome, Italy. It was designed in 1651 by Gian Lorenzo Bernini for Pope Innocent X whose family palace, the Palazzo Pamphili, faced onto the piazza as did the church of Sant'Agnese in Agone of which Innocent was the sponsor.
Piazza Navona (pronounced [ˈpjattsa naˈvoːna]) is a public open space in Rome, Italy. It is built on the site of the 1st century AD Stadium of Domitian and follows the form of the open space of the stadium in an elongated oval. The ancient Romans went there to watch the agones ("games"), and hence it was known as "Circus Agonalis" ("competition arena").
In the 17th century it became a showcase for Baroque design, with work by Bernini and Borromini among others. The Fontana dei Quattro Fiumi stands in front of the Church of Sant'Agnese in Agone.