Piazza Navona rock and decapitating some of the larger and smaller figures, after they recognised him by his sneakers. 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
Piazza della Rotonda the fountain in the Piazza della Rotonda was authorized on September 25, together with a fountain for Piazza Colonna, and two more for Piazza Navona; the fountain for the Rotonda, completed in 1575, was of a chalice-type design, around 3.5 to 4 meters in height, and fed with the Vergine water through a terracotta conduit. Della Porta designed the fountain, and Leonardo Sormani executed it. Due to the slope of the piazza, the fountain is approached by five steps on the south side, and only two on the north. Under the pontificate of Alexander VII Chigi, projects were set afoot