Tunnels spanning 3,000 square meters extend beneath the Roman Forum and the Theatre of Marcellus. The depth reaches almost 300 meters, and the official opening to the public is scheduled for late 2026 or early 2027.
The Grottino del Campidoglio, an underground network beneath the Roman Capitol, will reopen to the public after being closed for almost a century. The announcement was released by the Rome city hall and gained international repercussion via CNN.
According to the official project, the tunnels cover about 3,000 square meters. The maximum depth reaches approximately 300 meters below the surface.
According to the archaeological team, the complex lies beneath the Roman Forum and the Theatre of Marcellus. In parallel, part of the circuit crosses pre-Roman foundations.
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Sealed by Mussolini in 1929: the history of the Grottino del Campidoglio
According to The Sun, the underground network was sealed by order of dictator Benito Mussolini in 1929.

Indeed, Italian fascism closed several Roman structures to reorganize the urban landscape of the historic center.
In parallel, part of the galleries functioned as water cisterns and warehouses since Antiquity. Consequently, the space served commercial functions until the early 20th century.
According to historical records, the Grottino del Campidoglio went through several phases. First it was a stone quarry; then it became a cistern; subsequently, a commercial warehouse; and, in the 19th century, low-cost popular housing.
According to historians, Mussolini wanted to create a “Fascist Rome” that highlighted classical monuments without underground distractions. In turn, merchants and residents were expelled to other regions.
In parallel, the regime used cinema and propaganda to amplify the operation. According to records, more than 5,000 families were relocated to the center between 1929 and 1935.
Indeed, this process is today a central theme of Italian cultural memory. Consequently, the museum will also have a module dedicated to the history of fascism in the historic center.
US$ 2.8 million for restoration and opening in 2026-2027
According to the

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