The Ancient Romans held their chariot races in a specially-designed stadium called the Circus Maximus. The stadium is believed to have been built by the fifth ruler of Rome, the Etruscan king, Tarquin the Elder. The Etruscans were known for their skill in chariot racing and Tarquin, also known as Lucius Tarquinius Priscus and the first Etruscan king of Rome, helped to popularize the sport.
The remains of the Circus Maximus are situated in the center of the modern city of Rome, Italy. After the 6th century, the stadium was no longer used and fell into a state of decay. During the time of the Ancient Roman monarchy, however, it was capable of accommodating more than 150,000 spectators. The Circus Maximus was the largest stadium built by the Ancient Romans and it served as the model for similar structures built throughout what would later become the Roman Empire.