5 Best Sights in Naples, Italy

Known to locals as Maschio Angioino, in reference to its Angevin builders, this imposing castle is now used more for marital than military purposes—a portion of it serves as a government registry office. A white four-tiered triumphal entrance arch, ordered by Alfonso of Aragon after he entered the city in 1443 to seize power from the increasingly beleaguered Angevin Giovanna II, upstages the building's looming Angevin stonework. At the arch's top, as if justifying Alfonso's claim to the throne, the Archangel Michael raises his right arm to slay a demon.

Across the courtyard within the castle, up a staircase, is the Sala Grande, also known as the Sala dei Baroni, which has a stunning vaulted ceiling 92 feet high. In 1486, local barons hatched a plot against Alfonso's son, King Ferrante, who reacted by inviting them to this hall for a wedding banquet, which promptly turned into a mass arrest. (Ferrante is also said to have kept a crocodile in the castle as his pet executioner.) You can also visit the Sala dell'Armeria, where a glass floor reveals recent excavations of Roman baths from the Augustan period, with resin plaster casts of the skeletons also found here (the originals are in storage in the Museo Archeologico Nazionale). In the next room on the left, the Cappella Palatina, revolving exhibitions (some free) adorn the walls along with a few tiny remaining fragments of the famous Giotto pictures described by Petrarch.

Before climbing to the castle's first-floor gallery, with its beautiful Renaissance-era masterpieces, check out the magnificent 16th-century Cappella delle Anime del Purgatorio and its richly decorated gold-plated altar.

At the back of the courtyard are giant photographs of three Roman ships, wood amazingly intact, unearthed during recent digging of the nearby metro station and now hidden away for restoration. A few tour itineraries are offered, including one of the underground prisons and the terrace with its unrivaled views of Piazza Muncipio's Roman excavations.

A leading Naples showpiece created as an expression of Bourbon power and values, the Palazzo Reale dates from 1600. Renovated and redecorated by successive rulers and once lorded over by a dim-witted king who liked to shoot his hunting guns at the birds in his tapestries, it is filled with salons designed in the most lavish 18th-century Neapolitan style. The Spanish viceroys originally commissioned the palace, ordering the Swiss architect Domenico Fontana to build a suitable new residence for King Philip III, should he ever visit Naples. He died in 1621 before ever doing so. The palace saw its greatest moment of splendor in the 18th century, when Charles III of Bourbon became the first permanent resident. The flamboyant Naples-born architect Luigi Vanvitelli redesigned the facade, and Ferdinando Fuga, under Ferdinand IV, created the Royal Apartments, sumptuously furnished and full of precious paintings, tapestries, porcelains, and other objets d'art.

To access these 30 rooms, climb the monumental Scalone d'Onore (Staircase). On the right is the Court Theater, built by Fuga for Charles III and his private opera company. Damaged during World War II, it was restored in the 1950s; note the resplendent royal box. Pass through three regal antechambers to Room VI, the Throne Room, the ponderous titular object dating to sometime after 1850.

In the Ambassadors’ Room, choice Gobelin tapestries grace the beige fabric walls and the ceiling honors Spanish military victories, painted by local artist Belisario Corenzio (1610–20). Room IX was bedroom to Charles's queen, Maria Cristina. The brilliantly gold private oratory has beautiful paintings by Francesco Liani (1760).

The Great Captain's Room has ceiling frescoes by Battistello Caracciolo (1610–16); all velvet, fire, and smoke, they reveal the influence of Caravaggio’s visit to the city. A wall-mounted, jolly series by Federico Zuccari depicts 12 proverbs.

Room XIII was Joachim Murat's writing room when he was king of Naples; brought with him from France, some of the furniture is courtesy of Adam Weisweiler, cabinetmaker to Marie Antoinette. The huge Room XXII, painted in green and gold with kitschy faux tapestries, is known as the Hercules Hall, because it once housed the Farnese Hercules, an epic sculpture of the mythological Greek hero. Pride of place now goes to the Sèvres porcelain.

The Palatine Chapel, also known as the Royal Chapel, redone by Gaetano Genovese in the 1830s, is gussied up with an excess of gold, although it has a stunning multicolor marble intarsia altar transported from a now-destroyed chapel in Capodimonte (Dionisio Lazzari, 1678). Also here is a Nativity scene with pieces sculpted by Giuseppe Sammartino and others. Another wing holds the Biblioteca Nazionale Vittorio Emanuele III. Starting out from Farnese bits and pieces, it was enriched with the papyri from Herculaneum found in 1752 and opened to the public in 1804. The sumptuous rooms can still be viewed, and there's a tasteful terrace that looks onto Castel Nuovo.

The newly opened Galleria del Tempo is a multimedia trip through the history of Naples, in the Bourbon stables.

The oldest castle in Naples, the 12th-century Castel dell'Ovo dangles over the Porto Santa Lucia on a thin promontory. Built atop the ruins of an ancient Roman villa, the castle these days shares its views with some of the city's top hotels. Its gigantic rooms, rock tunnels, and belvederes over the bay are among the most striking sights that Naples has to offer. Some rooms are given over to temporary art and photography shows.

You enter the castle through its main entrance, below its forbidding trio of cannons. On the right is a large picture of the castle in Renaissance times. Turn left and look through the battlements to the intimate Borgo Marinaro below. An elevator on the right ascends to the castle top, or you can also continue along the walkway overlooking the ramparts. The roof's Sala della Terrazze offers a postcard-come-true view of Capri. This is a peaceful spot for strolling and enjoying the views.

As for the castle's name, the poet Virgil is supposed to have hidden inside the villa an egg that had protective powers as long as it remained intact. The belief was taken so seriously that to quell the people's panic after Naples suffered an earthquake, an invasion, and a plague in quick succession, its monarch felt compelled to produce an intact egg, solemnly declaring it to be the Virgilian original.

Perched on the Vomero, this massive castle is almost the size of a small town. Built by the Angevins in the 14th century to dominate the port and the old city, it was remodeled by the Spanish in 1537. The parapets, configured in the form of a six-pointed star, provide fabulous views. Once a major military outpost, the castle these days hosts occasional cultural events.