To enhance the exterior of the station, several areas were converted into fully pedestrian zones: the section of Via Armando Diaz between
Via Toledo and Via Oberdan, the portion of Via Toledo in front of the Church of Santa Maria delle Grazie, and the pre-existing intersection between Via Toledo and Via Diaz, which was transformed into a square later dedicated to Enrico Berlinguer. At the entrance on Via Diaz, parallel to Via Toledo, three hexagonal structures clad in blue and ochre tiles serve as skylights for the station’s atrium. The colors of these skylights are significant as they foreshadow the dominant tones within the station. A short distance along Via Diaz stands an equestrian statue titled
Il Cavaliere di Toledo, crafted by artist
William Kentridge in
weathering steel. The artwork was inaugurated on December 15, 2012, during the White Night event, marking the completion of the street’s redevelopment in conjunction with the station’s opening. The glass-clad elevator shaft aligns with an escalator covered by an undulating canopy and is followed by a unique walkway adorned with large circular patterns and seating areas. A fourth skylight, cylindrical in shape and decorated with mosaics, is situated near the center of Via Diaz within one of these circles. Parallel to the walkway is a row of circular canopies resembling overlapping umbrellas, which line the façade of the BNL building. Inside the station, two large mosaics by William Kentridge, executed by mosaic artist Costantino Aureliano Buccolieri, dominate the space. The first mosaic, located in the mezzanine level, depicts a typical Neapolitan scene filled with people in motion, including the artist himself and Saint Januarius (
San Gennaro). The artwork incorporates numerous references to Pompeii and Mount Vesuvius, with topographical maps of Naples in the background. The mezzanine is illuminated by natural light from the three external skylights and features segments of the Aragonese walls discovered during excavation. Descending the escalators, which are internally lit, visitors encounter the second mosaic on the frontal wall. This artwork portrays two figures pushing a cart loaded with symbols of the
1799 Parthenopean Republic, alongside a cat derived from a
Pompeian mosaic. In the background, one can discern plans for the urban renewal of Naples’ lower quarters in relation to the metropolitan railway. The contrast between the two environments becomes evident when descending the escalators. After the initial flights, dominated by ochre-colored tiling reminiscent of Neapolitan tuff stone, the transition leads into
Robert Wilson’s
Sea Gallery: an entirely mosaic-covered space featuring marine motifs. This area incorporates aquatic references, such as lighting reminiscent of waves and a large pillar designed to resemble a giant fountain jet. Within the station, the Naples branch of the
Istituto Nazionale di Fisica Nucleare (INFN) has installed a
cosmic-ray detector, accompanied by an informational totem, serving as a tool for scientific outreach. Continuing through the corridor leading to the platforms, animated panels by Wilson depict a rippling sea, further emphasizing the marine theme. On the mezzanine stairway walls, manipulated photographs by Achille Cevoli, such as
Men at Work, showcase the construction of the subway tunnel. The connecting corridor to the Largo Montecalvario exit is adorned with photographs by
Oliviero Toscani, taken in various locations within the city’s historic center for his initiative
Razza Umana/Italia. These images portray the faces of Neapolitan citizens who participated in the project by posing for the renowned photographer. According to the British newspaper
The Daily Telegraph, this station is the most beautiful subway station in Europe and the world, a recognition echoed by
CNN’s rankings. In 2013, it won the Emirates
Leaf International Award as
Public Building of the Year. In 2015, it received the
International Tunnelling Association Award—known as the "Academy Award of Underground Works"—beating entries from
Sydney and
Jerusalem. == Archaeological Finds ==