Piazza Navona Piazza Navona Piazza Navona () is a square in Rome, Italy. It is built on the site of the Stadium of Domitian, built in the 1st century AD, and follows the form of the open space of the stadium. The ancient Romans went there to watch the "agones" ("games"), and hence it was known as ""Circus Agonalis"" ("competition arena"). It is believed that over time the name changed to "in avone" to "navone" and eventually to "navona". Defined as a public space in the last years of 15th century, when the city market was transferred there from the Campidoglio, Piazza
Fontana di Piazza Colonna to the foot of the column of Marcus Aurelius. The source of the water for the fountain of Piazza Colonna was only 67 feet above sea level; like the Trevi Fountain, the Fontana della Barcaccia, and the fountains of Piazza Navona, all connected to the Acqua Vergine, the fountain of Piazza Colonna was unable to jet water high into the air. The original project of Della Porta was to place an antique Roman statue of a sea god, called Marforio, in the fountain, against a background of a rocky grotto, behind which the column of Marcus Aurelius would be seen.