Piazza del Plebiscito, also known in the past as Largo di Palazzo or Foro Regio, is a square located in the heart of Naples, Italy, covering approximately 25,000 m². Among the historic buildings that surround it are the Royal Palace, the Basilica of San Francesco di Paola, the Palace of the Prefecture and Palazzo Salerno. Over the centuries, the square has undergone several transformations, from its beginnings as an irregular widening where festivities were held around elaborate macchine da festa, designed by prominent architects such as Ferdinando Sanfelice and Francesco Maresca.

From the 17th century, the square underwent a process of "regularization", especially with the construction of the Royal Palace designed by Domenico Fontana. During the 18th century, architects working on the royal residence carried out more radical interventions, reconfiguring the square. In the early 19th century, under French rule during the Napoleonic period, the square underwent a significant change in appearance. Numerous religious buildings were demolished to enlarge the space and allow for better integration into the surrounding urban fabric.

In place of the religious buildings, state buildings were erected, along with the Doric hemicycle of lava stone and marble designed by Leopold Laperuta by order of Joaquin Murat. In the center of this hemicycle was projected another civil building dedicated to the events of the Napoleonides. Piazza del Plebiscito is located at the crossroads of important streets, such as Via Toledo, Via Chiaia and the seafront, in the vicinity of important monuments of Naples, such as the Teatro di San Carlo, the Galleria Umberto I and the Castel dell'Ovo. From the square, there is a visible view of the hill of San Martino, home to the Carthusian Monastery of San Martino and Castel Sant'Elmo.

The square develops in a wide architectural space, with a semicircular colonnade on the west side, where the Basilica of San Francesco di Paola stands out. Built by Ferdinand I as a votive offering for the reconquest of the Kingdom after French rule, it was designed by Pietro Bianchi in 1817 and completed in 1846, presenting a neoclassical style inspired by the forms of the Pantheon of Agrippa. The interior features ornaments, statues and paintings of the same period, with a seventeenth-century high altar and some fabrics from pre-existing cult buildings.

In front of the church, in the square, are the equestrian statues of Charles III and his son Ferdinand I. The first, by Antonio Cano, is the work of Antonio Cano and the second, of Antonio Cano. The first, the work of Antonio Canova between 1816 and 1822, is accompanied by the figure of the king carved by his disciple Antonio Calì, who only managed to complete the horse of the statue of Ferdinand I.