one of the finest squares in Rome, sometimes called Piazza Navona. It
takes its name from being the site of the Circus Agonalis. _Fêtes_ are
held here during Carnival, and a fair at the Epiphany.
Notice the three fountains--the centre one by Bernini: four figures,
representing four rivers, recline on a craggy rock; on its top stands
an Egyptian obelisk, at its base a lion and a sea-horse.