At the back of the temple is a chamber called the Parthenon, or chamber of the Virgin, which was used as a treasury and held the sacrifices. This plan was very common among temples of that period. Also see Greek art and mythology . Roman Colosseum , or Flavian Amphitheater , A.D. 70 to 82, a vast ellipse with tiers of seating for 50,000 spectators around a central elliptical arena. The Colosseum had approximately eighty entrances so crowds could arrive and leave easily and quickly.
Vaults span between eighty radial walls to support tiers of seating and for passageways and stairs.
Below the wooden arena floor, there were numerous rooms and passageways for wild beasts and other provisions for staging the spectacles. Eighty walls radiate from the arena and support vaults for passageways, stairways and the tiers of seats. At the outer edge circumferential arcades link each level and the stairways between levels. The three tiers of arcades are faced by three-quarter columns and entablatures , Doric in the first story, Ionic in the second, and Corinthian in the third. Above them is an attic story with Corinthian pilasters and small square window openings in alternate bays.