A few thousand years ago in ancient Rome and Greece, the circus already existed! Imagine, instead of our current clowns, sometimes happy, sometimes sad, illusionist magicians, fire-eaters and other sword swallowers, a band of Roman gladiators ready to give each other a beating, chariot races, simulated naval battles (called naumachia) and equestrian acts. Imagine again that all these people met at the Circus Maximus, the largest Roman building of antiquity and one of the largest of all time (it could accommodate 300,000 spectators, 3.75 times the Stade de France!). Julius Caesar had reason to be proud!