Naples' architectural heritage encompasses the events, figures, and designs that have shaped the city's urban and architectural development over the course of nearly three millennia.
Ancient era Parthenope Parthenope, founded on Mount Echia by the Cumaeans in the 8th century BCE, has left behind relatively few traces of its existence, including the remains of a 7th-century BCE necropolis and various clusters of settlement artifacts.
6th century BCE: The refounding as Neapolis
Neapolis, founded in the 6th century BCE, was distinguished by an orthogonal urban plan. This layout featured three main plateiai (later known as the Decumani: Via dei Tribunali, Via Anticaglia, and Via San Biagio dei Librai) oriented east-west, intersected at right angles by approximately twenty narrower stenopoi (later the Cardines), running north-south. These intersections formed rectangular blocks, or insulae, measuring approximately ..
The Agora/Forum of Neapolis is aligned with the Decumanus Maximus and remains accessible today through the excavations beneath the foundations of the Basilica of San Lorenzo Maggiore..
This is due to a specific circumstance: during the medieval period, following severe torrential rains, a lahar (mudflow) leveled this area, which originally formed a sort of valley. As a result, the new street level in this section alone was raised by approximately ten meters above the preexisting road network. Conversely, throughout the rest of the historic center, the streets represent an uninterrupted stratification of Greek and Roman road layouts, making them inaccessible beneath the modern city. This unique feature is one of the factors that contribute to the Historic Centre of Naples being recognized as a UNESCO World Heritage Site.
Two surviving columns from the Temple of the Dioscuri, located in the forum of Neapolis, can still be seen today on the façade of the nearby Basilica of San Paolo Maggiore.. In fact, until a devastating seismic event in the 17th century, the façade of the original temple remained entirely intact, as evidenced by various etchings from that period.
In more peripheral locations, thermal buildings and stadiums can still be found. Notably, on Via dell’Anticaglia, sections of walls and buttresses from the ancient Theater—likely the venue where Nero performed as a singer—are visible, having been incorporated into later constructions.. Currently, an extremely complex restoration project is underway to recover the structure, which remains largely intact but is entirely embedded within later buildings.
Tombs were located outside the city walls; they have been identified on Santa Teresa Hill, at Castel Capuano, in the areas of Santi Apostoli and San Giovanni a Carbonara, as well as between Castel Nuovo and Via Verdi, and beneath Via Medina.
Middle Ages
During the medieval period, Naples also experienced a significant economic, social, and demographic contraction. Under Angevin rule, in 1262, the city became the capital of the Kingdom of Sicily. However, within a few years, following the expulsion of the Angevins from Sicily, a long period of conflicts began between Naples and Aragonese Sicily.
Among the most significant structures built during this period were Castel Capuano, which facilitated the city's expansion towards the northwestern hinterland; Castel Sant'Elmo, which defended the city from the hills; and Castel dell'Ovo. These three fortresses enabled strategic control over Naples from the northwest, the Vomero hills, and the sea. With the rise of the Angevins, a new fortress, Castel Nuovo (also known as Maschio Angioino), was constructed between 1279 and 1282, inheriting the function of the royal residence of the rulers of Naples.
Among the initiatives promoted by Charles I of Anjou were the reclamation of vast marshy areas, encouragement of private construction, the construction of the Church of Sant'Eligio Maggiore,. the Tower of San Vincenzo, a hospital, and a new marketplace, as well as improvements to roads, aqueducts, and irrigation channels.
Modern age Aragonese rule
During the Aragonese government, the city saw a significant increase in religious foundations, reducing the available building space within the ancient walls. Naples experienced notable demographic growth during this period, reaching approximately 100,000 inhabitants. Consequently, the Aragonese government decided to expand the city's walls.
The strong ties with the Medici facilitated the arrival of the finest Tuscan architects, who contributed to the construction of aristocratic palaces. These architects also introduced new defensive systems, enhancing the city's fortifications and making them more effective with advanced weaponry.
At the end of the century, the city welcomed the Cosentine architect Giovanni Francesco Mormando, who, alongside local architects influenced by Roman styles—such as Novello da San Lucano. and Gabriele d'Agnolo—initiated a new phase of the Neapolitan Renaissance. This movement gained many followers in the 16th century, including Giovanni Francesco Di Palma, a student and son-in-law of Mormando.
The Spanish viceroyalty 16th century
During the 16th century, Viceroy Don Pedro de Toledo expanded the city's fortifications, effectively doubling the urban area and connecting the three main castles: Castel Nuovo, Castel dell'Ovo, and Castel Sant'Elmo. Among the other significant works of the viceroyalty was the transformation of Castel Capuano into a courthouse, a project led by the renowned local architect Ferdinando Manlio, who had already been appointed as the kingdom's official architect.
Throughout the 16th century, several prominent architects emerged, including Giovanni Francesco Di Palma, Gian Battista Cavagni, Giovanni da Nola, and Ferdinando Manlio. During the second half of the century, the city saw the construction of numerous new religious buildings, which would later shape the Neapolitan Baroque style in the following century. Many architects from this period belonged to religious orders, such as the Franciscan Giuseppe Nuvolo and the Jesuit Giuseppe Valeriano.
XVII secolo
During this century, the city expanded towards the Capodimonte hill, where popular neighborhoods developed, and along the Riviera di Chiaia, which became home to bourgeois districts. Neapolitan architecture remained largely influenced by Mannerism, with only a few Baroque structures being constructed, entrusted to distinguished architects such as Cosimo Fanzago and Dionisio Lazzari. Other architects primarily focused on designing interior decorations for churches and renovating bourgeois palaces.
The most significant Baroque works of the period can be found in the Certosa di San Martino and the Naples Cathedral (Duomo). In the city, Dionisio Lazzari established a highly productive workshop that specialized in designing some of the most exquisite commesso marble ensembles.
18th century
With the outbreak of the War of Spanish Succession, Naples came under Habsburg rule, governed through a series of viceroys. Despite ruling for twenty-seven years, the administration faced significant challenges in addressing the city's urban issues.
The central figure of the first half of the century was Francesco Solimena, who, in addition to being a painter and an outstanding architect, played a crucial role in training other architects who would dominate the scene until the mid-century, including Ferdinando Sanfelice, Giovan Battista Nauclerio, and Domenico Antonio Vaccaro.
In 1734, with the arrival of the Bourbons, Naples regained its independence. One of the first measures taken by Charles III of Bourbon was the taxation of ecclesiastical property, thereby curbing the expansion of sacred lands. Another significant initiative was the demolition of a substantial portion of the city's walls to alleviate congestion. Additionally, in 1740, a new land registry was introduced, known as the onciario cadastre, so named because taxable assets were assessed in ounce. However, the cadastre's major weakness was the complete tax exemption granted to feudal estates, despite their inclusion in the records. In an effort to limit feudal jurisdiction, Bernardo Tanucci spearheaded the approval of a legal decree (prammatica) in 1738, but six years later, the nobility successfully lobbied for its repeal. New architects emerged on the Neapolitan urban scene, including Giuseppe Astarita, Nicola Tagliacozzi Canale, and Mario Gioffredo, the latter embracing the emerging Neoclassical movement. Under Charles III, several architects from diverse backgrounds and external to the local tradition came to prominence, such as Giovanni Antonio Medrano (from Sicily), Antonio Canevari (from Rome), Ferdinando Fuga (from Florence), and Luigi Vanvitelli (a Neapolitan of Dutch origin trained in Rome). These four architects designed palaces, villas, and large complexes in the Baroque style, incorporating classical influences.
At the same time, the area around Mount Vesuvius became increasingly populated, serving as a favored retreat for Neapolitan nobility.
In 1775, during the period when the Map of the Duke of Noja was published by Giovanni Carafa di Noja, Duke of Noja Naples had a population of approximately 350,000 inhabitants.
In 1779, a royal decree established the division of the city into twelve districts: San Ferdinando, Chiaia, Montecalvario, San Giuseppe, Porto, Portanova-Pendino, San Lorenzo, Avvocata, Stella, San Carlo all’Arena, Vicaria, and Mercato. This reorganization also introduced street plaques and house numbers for the first time. However, this system was essentially a revival of the twelve municipal deputations (deputazioni municipali) that had been instituted in the 14th century. The deputations were a natural evolution of the phratries (fratrie), which also numbered twelve and held both religious and political functions. These included the Aristeri and Artemisi near Via Duomo, the Ermei and Eubei near the lower decumanus, the Eumelidi near Monte Echia, the Eunostidi near the Borgo dei Vergini, the Theodati, the Kretondi near what is now Vico SS. Filippo e Giacomo, the Kurmeni, the Panclidi, the Oinonei, and the Antinoiti near San Giovanni Maggiore..
Contemporary era 19th century The French Interlude and the return of the Bourbons
At the end of the 18th century, inspired by the ideals of the French Revolution, Naples experienced a period of political upheaval that led first to the brief establishment of the Parthenopean Republic (1799). In the early 19th century, following a temporary Bourbon restoration, the city entered a period of Napoleonic occupation.
Joseph Bonaparte, brother of Napoleon, commissioned the leveling of the Santa Teresa hill and the construction of a bridge over the Sanità Valley, projects that facilitated the creation of Corso Napoleone, a grand thoroughfare connecting the Royal Palace with the Capodimonte Palace, thereby ensuring continuity with the existing Via Toledo. In addition, he established the city's cadastral registry and initiated the first suppression of religious orders, repurposing monasteries as residential buildings or public offices.
With the rise of Joachim Murat, a reformist urban and political decentralization program was launched. Despite the enrichment of Naples with significant cultural institutions, the French period was not particularly prosperous.Spagnoletti, Storia del Regno delle Due Sicilie, p. 94 Under Murat's reign, the city expanded to incorporate the villages of Bagnoli, Fuorigrotta, Poggioreale, and Vomero.
Following the Bourbon Restoration, the dynasty regained control. One of its first projects was the completion of Piazza del Plebiscito, initially planned by the French, with the construction of the Royal Pontifical Basilica of San Francesco di Paola, designed by Pietro Bianchi in imitation of the Pantheon. This structure also served to obscure the urban congestion of the Pizzofalcone hill behind it.