Museo Napoli Novecento, Contemporary art museum in Castel Sant'Elmo, Naples, Italy.

Museo Napoli Novecento occupies the former high-security prison cells of Castel Sant'Elmo in Naples. Its roughly 170 paintings, sculptures and graphic works by about 90 artists, Neapolitan or tied to the city, cover 1910 to 1980. Ten intercommunicating cells flank each side of a central corridor, forming a ring-shaped route that begins with Liberty and post-impressionist painting of the 1910s and ends with Pop and informal art.

The museum was conceived by Nicola Spinosa to document Naples' twentieth-century avant-gardes; Angela Tecce, director of the Sant'Elmo complex, selected the 170 works by 90 artists. It was created with POR-FESR Campania 2007-2013 funds, involving the regional tourism and cultural heritage departments, and opened in the castle's former high-security prison cells, near the Bruno Molajoli art history library. Since December 2014 the ministry has managed it through the Polo museale della Campania, renamed Direzione regionale Musei in December 2019.

The exhibition path moves through early Liberty and post-impressionist orientations, then advances to Futurism and Pop Art, reflecting how artistic movements shaped Neapolitan culture over seven decades. This progression shows how the city engaged with modern artistic trends.

Plan for stairs and changing elevation levels as you move through the upper sections of the fortress, so wear comfortable footwear. The ring-shaped layout makes it easy to navigate without confusion and ensures a steady forward progression through the exhibition.

The galleries occupy the castle's former prison cells: ten on each side, interconnected and arranged around a central corridor that closes in a ring. The choice of these upper rooms was practical, since the Bruno Molajoli art-history library and the ministry's art-history photo archive were already housed nearby.