The huge, elliptical Amphitheatre has including the outer walls a dimension of 152 m resp. 122 m and is one of the biggest and undoubtedly the best conserved of the roman monuments in the world. Built in the first century AD, it boasts 2000 years of history, during which it met with various roles: a venue for gladiator performances, tournaments, capital punishment executions, theatre performances and nowadays it is the venue for the opera festival which takes place every year.