"Circus Maximus, and more freq. κατ̓ ἐξοχήν Circus, the oval circus built by Tarquinius Priscus between the Palatine and Aventine hills, which could contain more than one hundred thousand spectators. It was surrounded by galleries three stories high, and a canal called Euripus. Through its whole length, in the middle, a wall four feet high and about twelve broad was built, called spina, at the ends of which there were three columns upon one base (meta), around which the combatants were required to pass seven times before the prize was awarded. In the middle of the spina, Cæsar erected the obelisk, 132 feet high, brought from Egypt."