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Archaeologists from Montclair State University, in New Jersey, believe that a large oval area with curved walls and floors made of marble is, in fact, the arena where the emperor killed wild beasts, earning the nickname “the Roman Hercules,” as recorded in historical writings.
Found in Genzano, a village southeast of Rome which overlooks Lake Nemi, a crater lake in the Alban Hills, the oval structure measures 200 feet by 130 feet and dates to the 2nd century.
It was found by the U.S. team as they excavated thermal baths at an estate known as the Villa of Antonines.
“We first noticed a small section of a curving structure next to the baths. Ground-penetrating radar mapped out the entire foundations revealing new specular curving structures,” Deborah Chatr Aryamontri, a co-director of the excavation, told the Italian daily Il Messaggero. Forming an ellipse, the arena could sit more than 1,300 people. It featured an imperial box and was richly decorated with mosaic tesserae and luxurious, imported marbles. “The tesserae, or cubic tiles used for mosaics, include many from black and white compositions (leucitite and white limestone), while the remainder are small colored glass tesserae that represent a large part of the color spectrum and include transparent examples covered with gold leaf,” they added. According to the archaeologists, several large blocks of worked peperino stone would have helped support an awning system (velarium) to shade spectators from the sun, just like at the Colosseum in Rome.
Most likely, it was in this opulent setting that Commodus practiced for his first semi-public appearances as a killer of animals and a gladiator. Immediately after he became emperor, he displayed his strength in gladiatorial combats at Rome’s Colosseum.
According to his contemporary Dio Cassius, Commodus killed men in his private gladiatorial bouts, and was known for “slicing off a nose, an ear or various other parts of the body.” An accomplished left-handed fighter, determined to cast himself as “Hercules reborn,” Commodus was also a skilled hunter, showing his ability in the Colosseum by killing bears, tigers, hippopotamuses, elephants, but also domestic animals.
He delighted the public by shooting crescent-headed arrows at ostriches, who continued to dash around even after they had been decapitated.. At the private mini-Colosseum in Genzano, Commodus might have enjoyed more elaborate shows.
Indeed, an underground canal around the amphitheater suggests that naval battles were staged there. Leading down to underground chambers, a spiral staircase brings to mind the arrangements at the Colosseum in Rome. Most likely, lifts were used in the Genzano Colosseum to raise scenery and possibly animals.