Detail of chariot racing in the Circus Maximus, floor mosaic from the villa at Piazza Armerina in Sicily, first quarter of the fourth century AD
Elsner, Jaś. The Art of the Roman Empire, AD 100-450. Second ed. Oxford History of Art. Oxford: Oxford University Press, 2018.
This is one of the thousands of ebooks available at the University of Iowa Libraries. Check InfoHawk+ for titles and availability.