The Doria Castle is situated in a dominant position overlooking the Dolceacqua village. The first mention of the castle and the village, called at the time Dulzana, dates back to 1177 in an ancient document in which abuts the property of the counts of Ventimiglia. Will be in 1270, almost a hundred years later, the feud and its manor house will be purchased by Oberto Doria - the latter founder of the famous dynasty that will dominate Genoa and its Republic - which will expand its territories in the Nervia Valley up to the villages of Apricale, Perinaldo and Isolabona.
The castle will be in the 14th century in the center of fights between the factions of the Guelphs and the Ghibellines and the Doria family, exponent ghibellina, will therefore have to undergo two heavy sieges in 1319 and in 1329; the sieges were ordered by King Robert of Anjou, Count of Provence and the Guelfa, who succeeded in his aim of conquest forcing the Doria to submit to his will. The lords of the family will become therefore the vassals of the latter and afterwards of the Republic of Genoa. In 1744 the castle was once again the scene of clashes and furious battles because of its strategic position deemed important for the possible obstacle that could create to the French army and Spanish. The two armies, Allies, succeeded after violent struggles to conquer the fortress on 27 July 1745.
Originally the structure was composed in the 12th century by a circular tower - still existing at the center of the complex - and by a smaller building where he lived the office of guard. The castle was enlarged in the 16th century by the then lord local Stefano Doria, to which he added to the previous structure a bastion rammed in the eastern sector and the two square towers are identical. Today the structure appears as divided into two blocks, the front part was in fact intended to control and safety of the village as well as local service, prisons and warehouses; the rear, connected with the front body through a large courtyard, was instead where they were located the environments of the representation and reception of guests and where did the local lords.References:
Royal Palace of Naples was one of the four residences near Naples used by the Bourbon Kings during their rule of the Kingdom of the Two Sicilies (1734-1860): the others were the palaces of Caserta, Capodimonte overlooking Naples, and the third Portici, on the slopes of Vesuvius.
Construction on the present building was begun in the 17th century by the architect Domenico Fontana. Intended to house the King Philip III of Spain on a visit never fulfilled to this part of his kingdom, instead it initially housed the Viceroy Fernando Ruiz de Castro, count of Lemos. By 1616, the facade had been completed, and by 1620, the interior was frescoed by Battistello Caracciolo, Giovanni Balducci, and Belisario Corenzio. The decoration of the Royal Chapel of Assumption was not completed until 1644 by Antonio Picchiatti.
In 1734, with the arrival of Charles III of Spain to Naples, the palace became the royal residence of the Bourbons. On the occasion of his marriage to Maria Amalia of Saxony in 1738, Francesco De Mura and Domenico Antonio Vaccaro helped remodel the interior. Further modernization took place under Ferdinand I of the Two Sicilies. In 1768, on the occasion of his marriage to Maria Carolina of Austria, under the direction of Ferdinando Fuga, the great hall was rebuilt and the court theater added. During the second half of the 18th century, a 'new wing' was added, which in 1927 became the Vittorio Emanuele III National Library. By the 18th century, the royal residence was moved to Reggia of Caserta, as that inland town was more defensible from naval assault, as well as more distant from the often-rebellious populace of Naples.
During the Napoleonic occupation the palace was enriched by Joachim Murat and his wife, Caroline Bonaparte, with Neoclassic decorations and furnishings. However, a fire in 1837 damaged many rooms, and required restoration from 1838 to 1858 under the direction of Gaetano Genovese. Further additions of a Party Wing and a Belvedere were made in this period. At the corner of the palace with San Carlo Theatre, a new facade was created that obscured the viceroyal palace of Pedro de Toledo.
In 1922, it was decided to transfer here the contents of the National Library. The transfer of library collections was made by 1925.
The library suffered from bombing during World War II and the subsequent military occupation of the building caused serious damage. Today, the palace and adjacent grounds house the famous Teatro San Carlo, the smaller Teatrino di Corte (recently restored), the Biblioteca Nazionale Vittorio Emanuele III, a museum, and offices, including those of the regional tourist board.