Is one of the most beautiful and famous squares in Rome. It is located in the place where the emperor Domitian had built a stadium to host the athletic games Greek music along with equestrian and were part of the "certamen capitolinum" in honor of Jupiter. Its perimeter is the elongated shape of the ancient monument. The surrounding buildings are built on the foundations of the stands of the stadium. Some of this is visible in piazza di Tor Sanguigna. In 1500 took place there animal fights. In the 18th century the square was flooded, creating an artificial lake for nautical representations. Since the beginning of the modern era Piazza Navona is the center of the Roman Carnival.
Three Baroque fountains adorn the square: the Fontana dei Quattro Fiumi di Gian Lorenzo Bernini at the heart, the fountain of the Moor and the fountain of Neptune at either end. Notable is the Church of Sant'Agnese in Agone diFrancesco Borromini, restored in 2006-2007, one of the major achievements of the Roman Baroque. The two great artists were turned on rivals and someone believed to be noticed in the gesture of one of the statues of the central fountain, perfect Rio de la Plata, a message of low esteem or mockery of Bernini for the precarious stability of the Church. The story although fun is definitely false: the fountain, inaugurated in 1651, was made before, 1652 in St. Agnes. The square is full all day and also at night by tourists and consequently also of souvenir vendors. The Christmas market stalls where you can buy Christmas products and crib figurines.