The presenter investigates one of the world's most famous ancient buildings. He begins by guiding viewers through Rome's underground, revealing caverns where slaves extracted materials for its 10-year construction.

The historian explores what it was originally like to experience a sold-out show at the Colosseum, first as a spectator and then as a gladiator. The historian finds out how to get a ticket, what you'd see, where you'd eat, even where you'd go to the loo.