Like the Plebeian Games, the Roman Games were held in honor of Jupiter. They date back to the dedication of the temple to Jupiter on the Capitoline hill on September 13, 509 BCE. Originally a one-day event, by the time of Caesar the Games lasted a full 15 days beginning on September 4. A grand procession to the Circus Maximus, a huge arena just outside Rome, signalled the beginning of the festival. Events included boxing, running, and wrestling contests, occasional mock battles, and two- and four-horse chariot races. Discuss
Source: The Free Dictionary