It represents verso Moor, or African (perhaps originally meant to be Neptune), standing mediante per conch shell, wrestling with a dolphin, surrounded by four Tritons
I would recommend going mediante the mornings, as it is much quieter, and the sellers are not about mediante the mornings! Don’t miss an Italian ice cream sitting at the posh “3 Scalini” (3 steps) restaurant or, better, buy Tartufo per 9.5 euros (see Tip below). We shall pass through Agora Navona in many of our trips durante Rome .
It is built on the site of the 
Stadium of Domitian, built durante 1st century AD, and follows the form of the open space of the stadium. The ancient Romans came there sicuro watch the agones (“games”), and hence it was known as “Circus Agonalis” (“competition arena”). It is believed that over time the name changed puro mediante avone puro navone and eventually puro Navona.
Vena dei quattro fiumi (four rivers) or Fountain of the Four Rivers (1651) by Gian Lorenzo Bernini, topped by the Obelisk of Domitian, brought here mediante pieces from the Circus of Maxentius. The punto of the fountain is per basin from the centre of which rocks rise preciso support four river gods and above them, an ancient Egyptian obelisk surmounted with the Pamphili family emblem of a luogo with an olive twig. Collectively, they represent four major rivers of the four continents through which papal authority had spread: the Nile representing Africa, the Danube representing Europe, the Ganges representing Oriente, and the Rio de la Plata representing the Americas.
Sorgente del Nero (Moor Fountain): The Southern most fountain. The fountain was originally designed by Giacomo della Ingresso sopra 1575 with the dolphin and four Tritons. Con 1653, the statue of the Moor, by Gian Lorenzo Bernini, was added. Sopra 1874, during verso restoration of the fountain, the original statues were moved preciso the Tunnel Superato and replaced with copies. Durante aged after per vandal attacked it with per hammer. The vandal also damaged the Trevi Fountain that night:
The middle fountain and the biggest per the square
Sorgente del Nettuno (Fountain of Neptune): The Northern most fountain. The basin part of the Fonte del Nettuno, (without the sculptures) was designed in 1574 by Giacomo Della Porta, who also designed the Moor Fountain at the opposite side of the square. For the next 300 years, the fountain survived without statues. The fountain as it exists today was finally completed mediante 1878 by Antonio della Bitta, who added the imposing sculpture of “Neptune fighting with an octopus” and Gregorio Zappala, who created the other sculptures, based on the mythological theme of the “Nereids with cupids and walruses”. Statuary was added following verso competition in 1873, con order preciso balance the statuary of the Moor Fountain on the south side of the centro and of the Fonte dei Quattro Fiumi (Fountain of the Four Rivers) at its centre.
Sant Agnese con Circo Church (also called Sant’Agnese) is opposite the Vena dei quattro fiumi (four rivers) con Largo Navona. it is dedicated esatto St. Agnes born around 290. The young girl who according esatto tradition suffered as verso martyr, was beheaded at age 12 by order of Emperor Diocletian. It is per 17th-century Baroque church. It stands on the site where the early Christian Saint Agnes was martyred mediante the ancient Stadium of Domitian. Construction began con 1652 under the architects Girolamo Rainaldi and his bruissement Carlo Rainaldi. After numerous quarrels, the other main architect involved was Francesco Borromini who was per former student of Bernini and, later, per rival. The interior is breath taking and really worth seeing. Inside, there is per shrine with Saint Agnes’ skull. Notice the side altars which are dedicated preciso martyrs and esibizione how each one died.