Hi there,
I think you are after The Piazza del Quirinale
square which sits at the top of Quirinale Hill, the highest of the seven hills of
Rome. From this hill, you have a splendid view towards the Saint Peter's Basilica.
There are many things to be seen around the square, which boasts buildings on three sides and a clear view of the city down below from the fourth side.
The first thing that catches the eye in the square is a 46 feet tall Obelisk and the 18 feet tall statues of Castor and Pollux and also a fountain known as the Dioscuri
Fountain. The statues, which are
Roman replicas of Greek originals from the 5th century B.C, once stood at the entrance of the baths of Constantine.
The statues were placed here in 1588 by Pope Sixtus V. The obelisk was added in 1786 and the fountain's granite basin was added in 1818. The basin was designed by Rafael Stern and used an ancient Roman shell that once stood at the Forum where it was used as a trough.
Hope this helps
VacationBuddy