Piazza Barberini is easy to overlook, as it’s relatively small and surrounded by busy streets, but at its center is the Triton Fountain, a sculptural masterpiece by Gian Lorenzo Bernini.
The Triton Fountain, or Fontana del Tritone in Italian, was commissioned by Pope Urban VIII and built in 1642-1643 by Bernini. It was an outlet of the Acqua Felice aqueduct that the pope had just restored, and was the first public fountain Bernini designed that was free-standing.
The fountain features a large figure of Triton at its center, holding a conch shell to his mouth and blowing water out of it. Below him are four dolphins, whose tails form the base on which he kneels. Bernini also worked in the symbols of his patron, the Barberini family - there are bees carved into the dolphin tails.
The Barberini Palace is near the fountain on the square (today, it is home to the National Gallery of Ancient Art), and another Bernini fountain dedicated to Pope Urban VIII is not far away - it is known as the Fountain of the Bees.
There is another fountain in Rome with a similar name - Fountain of the Tritons - in front of Santa Maria in Cosmedin, the church where you’ll find the Mouth of Truth. That one is not a Bernini creation, so be sure you’re in Piazza Barberini to see the Bernini work.