This noble semicircular piazza (19th Century) is enclosed on one side by the royal palace, on the other by the neoclassical façade of the church of San Francesco di Paola, built on the model of the Pantheon in Rome and prolonged by a curving colonnade. Two equestrian statues stand in front of the church: one, by Canova, depicts Ferdinand I of Bourbon, the other is of Charles III of Bourbon. The royal palace was built at the beginning of the 17th Century by the architect Domenico Fontana and has been remodelled several times. The façade retains more or less its original appearance.
Since the late 19th Century the niches on the façade have contained eight statues of the most famous Kings of Naples. A huge staircase with twin ramps and crowned by a coffered dome leads to the apartments and the sumptuously decorated royal chapel. It was only after 1734 that royalty lived in the apartments. The richly ornamented rooms have retained their numerous work of art, tapestries, paintings, period furniture and fine porcelain.
https://www.italyguides.it/en/campania/naples/piazza-del-plebiscito