In Piazza Navona is the Fountain of the four rivers ( Fontana dei fiumi ). Begun in 1648, the fountain includes rocks,animals, and four enormous marble figures personifying the four continents and supporting a roman copy of an Egyptian obelisk. The Danube ( Europe ) is associated with a horse, the Rio della Plata (Americas ) is seen with an armadillo, the Nile ( Africa ) sits with a lion, and the Ganges ( Asia ) is shown with a snake.

Behind the fountain, on the west side of the square, is the church of St.Agnes built around the same time.