The pathway from the Imperial Palace to the imperial box at the Colosseum will now be accessible to the public. This hidden emperors’ route is known as the “Commodus Passage.”
The Commodus Passage—a long-hidden imperial corridor beneath the Colosseum—is scheduled to open to the public for the first time on October 27, 2025, marking a major milestone in Roman archaeology and conservation.
🏛️ Historical Significance
Named after Emperor Commodus (161–192 AD).
The passage linked the imperial box inside the Colosseum directly to the outside world, enabling emperors and elite dignitaries to enter unseen by the public.
It was not part of the original Flavian construction (72–80 AD), but was added later by excavating underneath the amphitheatre’s foundations.
🧱 Restoration and Features
Rediscovered and excavated in the 19th century, but remained closed to the public until now.
Restoration completed in September 2025, funded by the Colosseum Archaeological Park and Italy’s National Recovery and Resilience Plan (NRRP).
Visitors will see:
Marble-clad walls with traces of ancient metal clamps.
Stucco vaults depicting mythological scenes (e.g., Dionysus and Ariadne).
Painted plaster showing arena spectacles.
A tactile map and video reconstructions to aid accessibility.
🚶 Public Access and Experience
Entry will be limited to small groups of eight, similar to the panoramic elevator system.
About 30 meters of the passage are currently open, with plans to extend access further in 2026.
Visitors can observe live restoration work through a glass door at the end of the tour, combining public engagement with conservation efforts.
https://www.ansa.it/english/news/2025/10/07/commodus-passage-opens-to-public-for-first-time_015e0962-c0cf-4dbe-9a1c-02bc9f253aff.html
Below is an excellent video by Ryan Garrett about this tunnel and he examines other possible roles of this tunnel.