Lapis Museum: Guided Tour of the Submerged Decumanus
Descend 35 metres beneath Naples and travel 2,000 years back in time through ancient Greek-Roman cisterns and a living water museum.
The Lapis Museum Naples underground tour takes visitors beneath the historic centre of Naples into a world where Greek-Roman engineering, Baroque architecture, and wartime memory converge in a single subterranean route. Housed within the former Basilica di Pietrasanta, this guided experience is among the most layered underground journeys available in southern Italy.
The complex was designed by architect Cosimo Fanzago in the mid-seventeenth century, built over the remains of an ancient temple dedicated to the goddess Diana. That layering of civilisations is precisely what makes the descent so compelling: every metre downward is also a step further back through history.
The tour is rated easy in terms of physical difficulty, making it accessible to a broad range of visitors. The installation of the first archaeological elevator in Naples historic centre means that reaching a depth of 35 metres takes just 20 seconds, connecting the crypt level to the deepest underground spaces without the need for extensive stairwork.
A collaboration between the museum and the Naples water utility has restored the ancient cisterns to an active state, allowing water to flow once again through channels that have been dry for centuries. Combined with a carefully designed lighting system that plays colour and shadow across the vaulted ceilings, the effect is both historically instructive and visually striking.
Tour Highlights
The Water Museum (Museo dell'Acqua) restores the original hydraulic function of Greek-Roman cisterns, with live water flows and atmospheric lighting illuminating ancient vaulted chambers.
Naples' first archaeological elevator descends 35 metres in just 20 seconds, bridging the Baroque crypt and the deepest underground level without lengthy stair access.
The Sala della Luna installation pays tribute to the pagan origins of the site and the mythological figure of Diana, goddess of the forest and the moon.
The Sala dei Racconti presents a projected scene evoking the theatrical tradition of Eduardo De Filippo, grounding the experience in Neapolitan cultural memory.
The Sala dei Bombardamenti uses immersive installations to reconstruct the emotional atmosphere of wartime air raids, when these tunnels sheltered the civilian population.
The Basilica di Pietrasanta, designed by Cosimo Fanzago in the 1600s, sits directly above the route, adding a layer of Baroque heritage to an already historically dense visit.
Tour Itinerary
The tour begins at street level inside the former Basilica di Pietrasanta in the Naples historic centre. Visitors board the archaeological elevator and descend 35 metres to the underground network in approximately 20 seconds.
The first major stop is the Water Museum, where restored Greek-Roman cisterns now carry flowing water once again. Lighting installations highlight the volumes and vaulted ceilings of these ancient engineering structures.
The route continues to the Moon Room, an installation dedicated to the mythological origins of the site. The chamber reflects the cult of Diana, the deity to whom the pre-existing pagan temple was consecrated.
This room features a projected scene drawn from the Neapolitan theatrical tradition associated with Eduardo De Filippo. The installation connects underground history to the surface culture of the city.
The itinerary concludes in the Air Raid Room, where the cisterns served as shelters during World War II. Immersive sound and light installations reconstruct the tension and fear of those moments.
What Is Included
Included
- Professional guided tour of the Submerged Decumanus
- Access to the Water Museum (Museo dell'Acqua)
- Use of the archaeological elevator
- Entrance to all underground rooms: Sala della Luna, Sala dei Racconti, Sala dei Bombardamenti
- Lighting and multimedia installations along the route
Not Included
- Transport to and from the meeting point
- Gratuities for the guide
- Personal travel insurance
- Food and beverages
Important Information
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