Officials in Italy are adding a very modern-day feature to the Colosseum - a retractable floor.
The new floor will be part of a $12-million renovation aimed at restoring the Colosseum to "gladiator-era glory".
The floor will help protect the arena's underground tunnels that have been exposed to the elements for centuries. It will include features like trap doors and lifts that were part of the original Colosseum.
Once completed, the plan is to open the Colosseum up for concerts and other live events.