What is a Roman circus?

It was an open air stadium used for public events in the Roman empire. empire. The events usually held in such a circus were chariot and horse races and performances commemorating historical events. The performance space would be rectangular or oval surrounded by several tiers of seats for spectators. The circus would be decorated with ornate columns, obelisks and statues. The first circus built in Rome was the Circus Maximus which also happened to be its largest.