(1600) - Designed by Domenico Fontana for Viceroy Ferrante di Castro.
Enlarged and restored, it became the official residence of the Bourbon and Savoy kings.
The eight statues along the facade represent the heads of the various dynasties which have reigned over Naples, and were put there on the initiative of Umberto I.
Well worth seeing is the royal suite and the court theatre.
The Naples public library (Bibloteca Nazionale) is also housed in the Royal Palace.