The amphitheatre was the centre of entertainment in Roman times. It was a place where Roman citizens went to watch fights between gladiators and wild animals, such as bears or lions. The bloodier the battle, the more the crowd roared. The fighters were slaves or criminals whose punishment was to risk a most gruesome death.
These fights were so popular that schools were set up to train ordinary men as special fighters known as gladiators.
The largest amphitheatre in the empire was the Colosseum.
It could seat up to 50,000 people at once.
From the ruins of the Colosseum, archaeologists have put together an idea of what happened at these fights.