About how many people could the ancient Roman Colosseum hold when at total capacity?

The Colosseum, also named the Flavian Amphitheater, is a large amphitheater in Rome. It was built during the reign of the Flavian emperors as a gift to the Roman people.

Construction of the Colosseum began sometime between C.E. 70 and 72 under the emperor Vespasian. It opened nearly a decade later and was modified several times in the following years. The massive structure measured approximately 189 by 156 meters (620 by 513 feet), towered four stories high, and included eighty entrances to the amphitheater—seventy-six for the patrons, two for participants of events, and two exclusively for the emperor to use. The sheer number of entrances proved to be necessary: the Colosseum could hold more than 50,000 spectators at its maximum capacity.