Describe the architecture of the Colosseum. Why did the Flavian family build it?

What will be an ideal response?

Answer: The ideal answer should include:
1. The Colosseum is an elliptical building constructed of brick, stone, and marble blocks.
2. The exterior features a three-story round-arch colonnade, and each level is in a different architectural order.
3. Each rounded arch on the lower level is also extended into a concrete barrel vault.
4. The Colosseum could accommodate thousands of spectators for entertainment events and was likely built by the Flavian family to improve their public image and legitimacy as rulers.