“The Colosseum or Coliseum is an oval amphitheatre built of travertine limestone, tuff (volcanic rock), and brick-faced concrete. It was the largest amphitheatre ever built at the time and held 50,000 to 80,000 spectators.
The Colosseum was used for gladiatorial contests and public spectacles but ceased to be used for entertainment in the early medieval era.
Although substantially ruined because of earthquakes, thieves, and stone-robbers, the Colosseum is still an iconic symbol of Imperial Rome and is listed as one of the New Seven Wonders of the World.”