Posillipo: The history of Naples' most exclusive hill, from kings to emperors.

Posillipo is the hill that borders the Gulf of Naples to the west, a tuff promontory suspended between the sea and the Phlegraean Fields. For two thousand years, it has been one of the city's most exclusive addresses: here, Roman emperors built villas overlooking the water, and the Bourbons and European nobles their residences. Today, the hill is home to one of the three official seats of the President of the Republic.

Yet Posillipo isn't just an upscale neighborhood. It's a place steeped in history, legends, and archaeological surprises, where a 770-meter- long Roman tunnel still runs through the mountain.

Here we retrace the history of the hill, from the Roman Pausilypon to the neoclassical villas, passing through Virgil and the village of Marechiaro.

A name that means respite from pain

The name Posillipo derives from the Greek Pausilypon (Παυσίλυπον), which literally means "respite from pain" or "that puts an end to pain." It is a name linked to the view of the gulf, the same one enjoyed two thousand years ago.

Before this name, the hill was known as Mons Ammenus , meaning "pleasant mountain," due to its mild climate and quiet location. In Neapolitan, Posillipo is called Pusilleco or Pusillepo.

The toponym originated as the name of the villa of the Roman knight Publius Vedius Pollione and only later was it extended to the entire promontory.

The tuff promontory between two gulfs

From a geological perspective, Posillipo is a yellow tuff relief , formed by eruptions from the Phlegraean Fields, which over the millennia have shaped the entire area west of Naples. The promontory separates the Gulf of Naples from that of Pozzuoli and slopes down to the sea with steep cliffs, hidden coves, and small beaches.

This very conformation has made the hill a privileged location since ancient times. The tuff, easy to mine and resistant, allowed Roman engineers to excavate tunnels in the rock and create cisterns, rooms, and terraces for villas.

The Roman villa of Publius Vedius Pollio

After the Battle of Actium in 31 BC, the wealthy Roman knight Publius Vedius Pollio chose the stretch of coast between Gaiola and Trentaremi Bay to spend the last years of his life. He built a sumptuous villa which he called Pausilypon, "relief from pain." Next to it, he built a theater, an odeon for small performances, a nymphaeum, and a bathhouse.

The theater could accommodate approximately 2.000 spectators . It was not a simple private retreat, but a true pleasure city overlooking the sea, with structures extending right down to the surface of the water.

Pollio didn't go down in history only for his villa. He was also a controversial figure for his cruelty, cited by Seneca as an example of ruthless masters. Upon his death in 15 BC , much of the estate passed to Octavian Augustus : the area became imperial property, and the villa remained a place of recreation for the emperors.

The Seiano Cave, the tunnel that defies time

To connect the villa to the ports of Puteoli (modern-day Pozzuoli) and Cumae , a tunnel was dug into the tuff rock. The first tunnel was built about fifty years before the Common Era by the architect Lucius Cocceius Aucto at the behest of Marcus Vipsanius Agrippa.

In the 1st century AD , Lucius Aelius Sejanus , prefect of the Praetorium of the Emperor Tiberius, oversaw its enlargement and arrangement. The tunnel takes its name from him: Grotto of Sejanus.

The tunnel is 770 meters long , with a straight path and a variable section in height and width. Three secondary tunnels branch off from the south wall, ending in openings overlooking the Trentaremi Bay, which provide valuable light and ventilation to the passageway.

Having fallen into disuse and forgotten for centuries, the cave was rediscovered by chance in 1841 during construction of a new road. It was Ferdinand II of Bourbon who made it passable again, transforming it into a popular stop for travelers.

From the imperial Pausilypon to the noble villas

With the end of ancient times, Naples closed itself within its walls, and the hill fell into decline, exposed to raids. It revived in the Middle Ages through small hamlets of fishermen and farmers, including Santo Strato , the most populous, then Megaglia, Spollano, and Angari.

For centuries, these villages had an independent social life, with an economy based on fishing and agriculture. It was the viceregal era that brought noble villas back to Posillipo, as had happened centuries earlier under the Romans.

In the 17th century the viceroy Antonio Álvarez de Toledo had the first road built to connect the villas and farmhouses to the city: the first stretch of what would become Via Posillipo.

The route was completed much later. Between 1812 and 1824 , under Joachim Murat , the road reached the village of Marechiaro. Between 1820 and 1830 it was extended to Coroglio, on the Gulf of Pozzuoli.

Posillipo remained an autonomous hamlet until 1925 , when it was integrated into a district of Naples.

The School of Virgil and the Legend of the Magician

Posillipo is also linked to the memory of Publius Virgil Maro , the Latin poet who lived in Naples and wanted to be buried here. Popular tradition attributed magical powers to him, to the point that many believed he was the one who excavated the Crypta Neapolitana in a single night.

Virgil's School , along the coast to the west, is the area where, according to legend, the poet practiced his arts. The Crypta Neapolitana, also known as the Posillipo Grotto or Virgil's Grotto, is a 711-meter -long tunnel dug into the tuff between Mergellina and Fuorigrotta.

Today the entrance to the cave is located inside the Virgil Park in Piedigrotta , which houses the tomb that tradition says is that of Virgil and the funeral monument of Giacomo Leopardi.

Grand Tour travelers fell in love with Posillipo

Between the eighteenth and nineteenth centuries, Posillipo became one of the obligatory stops on the Grand Tour . European scientists, writers, and artists climbed the hill to admire the gulf and to walk through the Roman tunnels.

One of the most famous accounts is that of Johann Wolfgang von Goethe , who in his Italian Journey described a visit to the Posillipo Cave at sunset. The beauty of the place led him to write that he had forgiven "all those who lose their minds over this city."

Since then, the hill has remained in the imagination of travel in Italy: a place where the landscape, archaeology, and the sea merge into a single vista.

Marechiaro and the most famous fenestella in Naples

The village of Marechiaro is perhaps the most iconic corner of Posillipo. Its name derives not, as many think, from the transparency of its water, but from its stillness. Documents from the Kingdom of Sicily already mention it as mare planum , "flat sea," which in Neapolitan becomes mare chianu and then Marechiaro.

The village developed around the church of Santa Maria del Faro , already mentioned in the 13th century and restored in the 18th century based on a design by Ferdinando Sanfelice.

Marechiaro owes its fame to the fenestella , the small window with carnations made famous by the song "Marechiaro" by Salvatore Di Giacomo , set to music by Francesco Paolo Tosti . The lines "Quanno sponta la luna a Marechiaro, pure li pisce nce fanno a ll'ammore" have entered the city's collective memory.

Not far away, by the sea, is the so-called Palace of the Spirits , a building linked to one of the most well-known legends of the coast: according to tradition, nocturnal presences roam there, fueling the mystery that has always surrounded this stretch of coast.

Historic villas: Villa Rosebery and Villa Doria d'Angri

In Posillipo, luxury residences have accumulated over the centuries. The most famous is Villa Rosebery , built in 1801 by order of the Austrian nobleman Joseph von Thurn. In 1857, it was purchased by Louis of Bourbon , brother of King Ferdinand II, who renamed it "the Brazilian" in honor of his wife Gennara of Braganza.

In 1897 the villa passed to the British Lord Rosebery , Archibald Primrose, who had been Prime Minister of the United Kingdom from 1894 to 1895. In 1932 his heirs donated it to the Italian State and in 1934 it was named Villa Maria Pia.

Today it is one of the three official residences of the President of the Republic, along with the Quirinale and Castelporziano, with a 6,6 hectare garden . Precisely for this reason it cannot be visited, except on rare occasions.

Not far away stands Villa Doria d'Angri , built in 1833 by Prince Marcantonio Doria d'Angri to a design by Bartolomeo Grasso . Today it is home to the University of Naples Parthenope.

Posillipo Today: What to See

The archaeological heart of Posillipo is the Pausilypon Archaeological Park , opened to the public in 2009 and covering approximately 416.000 square meters . It can be accessed from Descenda Coroglio 36 , passing through the Seiano Cave: a route that is worth the visit in itself.

Inside you can admire the remains of Pollione's villa, the theatre and the odeon, while the submerged structures are protected by the Gaiola Underwater Park , established in 2002.

At the top of the hill is Parco Virgiliano , a large lookout point offering 360-degree views of the gulf, Capri, Ischia, and Procida. Along Via Posillipo , villas, views, and access to beaches, including the public beaches of Posillipo, line the streets.

The Posillipo district is today one of the most sought-after residential areas of the city, but it retains its character as a place suspended between the sea and the hill.

Curiosities about Posillipo

• The patron saint of the neighborhood is Holy Stratus, celebrated the August 17th.
• The inhabitants of Posillipo are called Posillipini.
• The promontory separates the Gulf of Naples from gulf of Pozzuoli.
• Pollione's villa extended right below sea level: much of it is now a submerged archaeological site.
• The name Pausilypon also passed to the villa and the entire archaeological area, so much so that the park is known as the Pausilypon Park.

Frequently Asked Questions about Posillipo

Where is Posillipo located?

Posillipo is a hilly neighborhood in western Naples. It borders Chiaia to the east, and Fuorigrotta and Bagnoli to the north and west. It overlooks the Gulf of Naples to the south. Its zip code is 80123.

What does the name Posillipo mean?

It derives from the Greek Pausilypon , meaning "respite from pain." It was the name of the Roman villa of Publius Vedius Pollio and later extended to the entire hill, formerly known as Mons Ammenus.

Can you visit the Pausilypon Archaeological Park?

Yes. The park has been open to the public since 2009 and can be visited starting from Descenda Coroglio 36 , passing through the Seiano Cave. Opening hours and access methods vary from time to time and are managed by the Gaiola Interdisciplinary Study Center, so it's a good idea to check before your visit.

What is the difference between the Grotto of Seiano and the Crypta Neapolitana?

They are two different Roman tunnels, both carved into the Posillipo tuff. The Grotta di Seiano is 770 meters long and connects the Bagnoli plain, on Via Coroglio, to the Gaiola valley, passing through the Trentaremi bay. The Crypta Neapolitana is 711 meters long and connects Mergellina, in Piedigrotta, with Fuorigrotta.

Is Virgil's tomb in Posillipo the real one?

This is a traditional tomb. The tomb that popular tradition attributes to Virgil is located in the Parco Virgiliano in Piedigrotta, alongside Giacomo Leopardi 's funerary monument . There is no certain evidence that the poet's remains are there.

Can you visit Villa Rosebery?

No, except on rare occasions. Villa Rosebery is one of the official residences of the President of the Italian Republic, along with the Quirinale and the Castelporziano estate. It is not normally open to the public.