Fontana delle Tartarughe first water flowing to a reservoir near the present Trevi Fountain. Della Porta and the city of Rome made a plan to build eighteen new fountains connected to the new aqueduct. He began in 1572 with the fountain in Piazza del Popolo, then built the two famous fountains of Piazza Navona (1574–1578), and the fountain in Piazza della Rotonda in front of the Pantheon (1575). + In the original plan of 1570 a new fountain was to have been placed near the Theater of Marcellus in the Piazza Giudea, the site of a market in the Roman Ghetto. One of
Piazza Navona Navona was transformed into a highly significant example of Baroque Roman architecture and art during the pontificate of Innocent X, who reigned from 1644 until 1655, and whose family palace, the Palazzo Pamphili, faced the piazza. It features important sculptural and creations: in the center stands the famous Fontana dei Quattro Fiumi or Fountain of the Four Rivers (1651) by Gian Lorenzo Bernini, topped by the Obelisk of Domitian, brought in pieces from the Circus of Maxentius; the church of Sant'Agnese in Agone by Francesco Borromini, Girolamo Rainaldi, Carlo Rainaldi and others; and the aforementioned Pamphili palace, also by Girolamo