The Colosseum in Rome, Italy. Photo by Cheng Tingting/Xinhua via Getty Images.

Italian authorities say they will build just such a retractable floor in the arena, which has been without one for more than 1,000 years. They have issued a request for bids for a project that will install a new floor so that visitors can experience the Colosseum from the viewpoint of those who fought to the death on its floor.

Proposals must be submitted by February 1. Work is expected to get underway next year and be completed by 2023. Italy will subsidize the project with a grant of €10 million (about $12 million).

“We want to give an idea of how it was and we are seeking proposals from around the world,” Alfonsina Russo, the director of the Colosseum, told The Times.

Once the new infrastructure is complete, concerts and theatrical productions will be hosted there.

“The arena will be used for high culture, meaning concerts or theater,” Russo told the Times, “but no gladiator shows.”

Inaugurated in 80 A.D., the Colosseum seated 35,000 Romans who witnessed battles to the death involving not only prisoners and gladiators, but also beasts of prey like bears, leopards, and tigers that were delivered to the arena through a complex system of lifts. Engineers also flooded the floor, where prisoners were conscripted into teams to re-enact epic historical naval battles.

The last gladiatorial battles were fought there in the 5th century A.D., at the time of the fall of the Roman Empire.