Historian Peter T. Struck says that Diocles, a Lusitanian Spaniard who lived from 104 to 146 AD, earned 35,863,120 Roman sesterces in his lifetime - a figure that would amount to the $15 billion in today's money. The number is inscribed on a monument in Rome, erected for Diocles by his fans at the end of a 24-year career.
The most famous races took place at Circus Maximus, a sports arena in Rome. Drivers generally came from lower social classes and affiliated with teams. The colors of the team jerseys - Reds, Blues, Whites and Greens - made it easier for fans to keep up with and root for their favorites. For the large majority of his chariot-racing life, Gaius Appuleius Diocles was a Red.
Races began when the emperor dropped his napkin and ended seven breathless laps later. Those who didn't get maimed or killed and finished in the top three took home prizes.
As a charioteer, Diocles was known for a strong final dash, says Struck. His wardrobe consisted of a leather helmet, protector for the chest, shin guards, a jersey and a whip. He also carried a curved knife to use on opponents or if he got tangled up in the reins as a result of a fall.
From 4,257 four-horse races in which he competed in, Diocles won 1,462. He also placed in another 1,438 races (mostly second place)
If you're in the mood for some chariot racing, here's the classic clip from the 1959 film Ben Hur:
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Article from Big Think