New Castle rises near the harbour as one of Naples’ most recognisable medieval landmarks. Its history begins in 1279, when Charles I of Anjou, King of Sicily, ordered the construction of a new royal fortress to serve as both a defensive stronghold and a symbol of power. At the time, Naples had recently become the capital of the Kingdom of Naples, and the castle’s location near the sea underlined its political and strategic importance.

Over the centuries, New Castle was repeatedly modified as control of the city passed from the Angevins to the Aragonese and later rulers. The most significant transformation occurred in the 15th century under Alfonso V of Aragon, who added the imposing cylindrical towers seen today and commissioned the white marble triumphal arch that marks the main entrance. This arch, celebrating Alfonso’s victorious entry into Naples in 1443, blends classical Roman imagery with Renaissance ideals and stands in deliberate contrast to the fortress’s dark volcanic stone.

Beyond its military role, New Castle also functioned as a royal residence and cultural centre. The castle hosted court ceremonies, diplomatic meetings, and intellectual gatherings. One of its most notable interior spaces is the Hall of the Barons, a vast hall once used for royal assemblies, whose ribbed vault combines Gothic tradition with early Renaissance experimentation. The imposing room can be reached via a long staircase on the northern wall of the inner courtyard. From the courtyard, the beige wall of the Hall of the Barons contrasts with the dark grey of the Palatine Chapel-the only surviving element of the 14th-century Angevin castle. The chapel can be recognised by its Renaissance portal and the rose window above it.

In addition, the castle houses interior museum spaces displaying sculptures, fresco fragments, and archaeological finds connected to Naples’ medieval and Renaissance history.

Despite later losing its status as a royal home, the castle remained central to Naples’ political life well into the modern era, serving as military and civic administrative offices until 1815.

Spaccanapoli is one of the oldest and most defining streets in Naples, cutting a straight line through the historic centre and giving the impression of splitting the city in two. Its name comes from this very effect-spacca Napoli literally means “it splits Naples.” The street follows the route of one of the original decumani, the main east–west roads of the ancient Greek city of Neápolis, laid out in the 5th century BC and still forming the backbone of the historic centre today.

Because Spaccanapoli sits directly on this ancient grid, walking along it is a journey through multiple layers of history compressed into a single corridor. Roman foundations lie beneath medieval buildings, while Renaissance palaces, Baroque churches, and modest residential structures line the route. Over the centuries, the street has been known by different names along its length, but it has always functioned as a central artery for trade, religion, and daily life. Unlike larger avenues created by later urban planning, Spaccanapoli grew organically, shaped by continuous use rather than formal redesign.

Spaccanapoli offers one of the most immediate and unfiltered encounters with Naples. Churches such as Santa Chiara open directly onto the street, while small workshops, bookshops, bakeries, and family-run businesses operate at ground level. Laundry lines overhead and scooters threading through narrow gaps further reinforce the street’s lived-in character. One of the more unusual stops is the Doll Hospital, which specialises in restoring statues and antique dolls. Children are often drawn to the display of miniature hospital beds, while an adjoining museum showcases a collection of antique dolls and toys.

San Gregorio Armeno Street, often called “Christmas Alley,” is known worldwide for its long tradition of nativity-scene craftsmanship. The street runs through the historic centre, connecting Spaccanapoli with Tribunal Street, and follows the line of one of the ancient streets of Greek Neápolis.

The street takes its name from the nearby Church and Monastery of San Gregorio Armeno, founded in the 10th century by a community of Basilian nuns who brought relics of Saint Gregory the Illuminator, the patron saint of Armenia, to Naples. Over time, the religious complex became one of the city’s most important convents.

By the early modern period, San Gregorio Armeno Street had become the centre of Naples’ presepe tradition-the elaborate nativity scenes that go far beyond the biblical story to include everyday Neapolitan life. Artisans set up workshops along the street, producing hand-crafted figurines made from terracotta, wood, and fabric. These figures range from classic shepherds and biblical characters to bakers, musicians, market vendors, and, in more recent times, contemporary public figures.

The street offers a highly concentrated sensory experience. The atmosphere becomes especially animated in the weeks leading up to Christmas, but the street remains active year-round, making it one of the few places in Naples where a seasonal tradition never truly pauses.

Naples Cathedral’s construction began in the late 13th century under Angevin rule, on a site already occupied by earlier Christian basilicas and Roman structures. This complex past is still visible today: beneath and beside the cathedral lie the remains of early Christian churches, including the Basilica of Santa Restituta.

The cathedral’s main structure reflects Gothic architectural principles introduced from northern Europe, particularly in its soaring interior and pointed arches. Earthquakes, fires, and restorations reshaped parts of the building, introducing new artistic influences over time. The façade seen today dates largely from a 19th-century Neo-Gothic restoration, while the interior preserves medieval elements alongside Baroque chapels and artworks.

One of the cathedral’s most important spaces is the Chapel of the Treasury of San Gennaro, built in the early 17th century and entirely separate from the cathedral’s original structure. Facing the apse, entering the right side of the cathedral brings you close to the chapel. The entrance is easily recognisable thanks to its imposing scale and black gate. This richly decorated Baroque chapel houses the relics of San Gennaro, Naples’ patron saint. Several times a year, crowds gather here to witness the so-called miracle of the liquefaction of the saint’s blood, a ritual deeply embedded in local tradition. According to legend, failure of the blood to liquefy is seen as an omen of disaster for the city.

Directly opposite the entrance to the Chapel of the Treasury of San Gennaro is the entrance to the Basilica of Santa Restituta, the original church dating to the 4th century AD. Inside, the basilica preserves several remarkable elements, including a Greek wall associated with the ancient Temple of Apollo, a stretch of Roman aqueduct, and an inclined section of ancient Greek roadway.

While you are here, you can step from the main nave into earlier basilicas, observe medieval mosaics and tombs, and contrast the cathedral’s restrained Gothic lines with the dramatic Baroque intensity of the Chapel of the Treasury of San Gennaro.

Tribunal Street is one of the main historic arteries of Naples, running parallel to Spaccanapoli through the heart of the old town. Its origins go back to the Greek foundation of Neápolis in the 5th century BC, when the city was laid out according to a strict grid. Tribunal Street follows the line of the ancient decumanus maximus, the principal east–west road of the Greek and later Roman city, making it one of the oldest continuously used streets in Europe.

The street takes its modern name from the tribunals and administrative buildings that stood here during the Roman period. Over time, Tribunal Street remained a central route, adapting to each historical phase layered above it.

Some of Naples’ most important religious buildings open directly onto the street, including the Cathedral of Naples, with its blend of early Christian, medieval, and Baroque architecture. At the same time, everyday life unfolds at street level: food shops, bakeries, cafés, and small businesses occupy ground floors that have been in constant use for centuries.

Tribunal Street is also closely associated with Naples’ food culture, particularly pizza. Several long-established pizzerias are located along the street, making it a popular stop for visitors as well as locals.

Toledo Street is one of Naples’ principal arteries and has long functioned as a dividing line between different layers of the city. It was laid out in 1536 during Spanish rule by the viceroy Pedro Álvarez de Toledo, from whom the street takes its name. The project was part of a broader effort to impose order on a rapidly growing city, creating a wide, regulated thoroughfare that contrasted with Naples’ dense medieval street network.

From the outset, Toledo Street was designed as a prestigious urban axis. Noble palaces, churches, and administrative buildings rose along its length, while the densely populated Spanish Quarter developed immediately uphill, housing soldiers and working families. Over time, Toledo Street became a showcase for architectural trends, from Renaissance and Baroque façades to later 19th-century additions linked to Naples’ modernisation after Italian unification.

In the 19th and early 20th centuries, the street evolved into a commercial hub, a role it continues to play today. Shops, cafés, cinemas, and theatres line both sides, making it one of the city’s busiest pedestrian corridors. Despite modernisation, traces of earlier centuries remain visible in courtyards, side streets, and historic storefronts, especially where Toledo Street intersects with older routes such as Spaccanapoli.

Plebiscite Square is the largest and most ceremonial public square in Naples, opening directly onto the waterfront at the edge of the historic centre. Its name refers to the plebiscite of 1860, when the Kingdom of the Two Sicilies voted to join the newly unified Kingdom of Italy-a political moment that marked the end of centuries of Bourbon rule. Long before that vote, however, the square functioned as a stage for royal power, military parades, and civic spectacle.

The square took its present form in the early 19th century under Joachim Murat, Napoleon’s brother-in-law and King of Naples, who envisioned a grand neoclassical space inspired by imperial ideals. Dominating its eastern side is the Royal Palace of Naples, begun in the early 1600s and long the residence of Spanish viceroys and later Bourbon kings.

After World War II, the square fell into neglect and was used as a large parking area until 1997, when it was restored ahead of the G7 summit held in Naples. This restoration returned the piazza to its original role as a monumental civic space.

Today, Plebiscite Square offers both scale and pause. It is one of the few places in Naples where the sky feels expansive, making it a popular meeting point and a natural threshold between the old city, the royal quarter, and the sea. Largely free of traffic, the square invites visitors to slow down, observe details, watch daily life unfold, or simply take in the symmetry and openness that set it apart from the surrounding streets.

Galleria Umberto I is one of Naples’ most recognizable 19th-century landmarks, built at a time when the city was undergoing major urban transformation. Construction began in the late 1880s, shortly after Italian unification, as part of a large-scale renewal project aimed at modernising the area behind the Royal Palace and the San Carlo Theatre. The gallery was named after King Umberto I of Italy and conceived as a symbol of progress, order, and civic pride.

Completed in 1891, the gallery reflects the optimism of the era through its monumental scale and elegant use of iron and glass. Its most striking feature is the vast glass dome rising above a cruciform interior, allowing natural light to flood the space below. The floor is decorated with colourful mosaic pavements representing the signs of the zodiac, arranged beneath the intersecting arms of the arcade.

Historically, the gallery was intended as a refined social space rather than a purely commercial one. Modelled on grand European arcades such as Milan’s Galleria Vittorio Emanuele II, it was designed to host cafés, shops, and cultural venues, offering shelter from the weather and a place for leisurely strolling. Galleria Umberto I also serves as the setting for the novel The Gallery by American writer John Horne Burns, which depicts life in occupied Naples in 1944 during World War II.