The purpose of the pyramids is to hold and protect the bodies of the decised pharohs and it was also used to hold jewels, golds, and other precious items.
The Great Pyramid of Giza was built for the Fourth Dynasty Pharaoh Khufu (or Cheops), and was completed around 2560 B.C. They were made out of limestone that could weigh up to 15 tons
The Roman Colosseum was a huge amphitheatre built between 69 and 79 CE. The purpose of the Roman Colosseum was to act as an entertainment hub where people would watch all kinds of games and sports.