This first of four pods on the Colosseum offers a general overview of the structure, including its architecture and the materials used to build it. We also consider why the Flavian Dynasty of Emperors chose to build it where they did, right where there had been a beautiful water feature of Nero's sprawling "Golden House." We raise but do not yet address the question of what to think about those who took such delight in the cruel events staged in the Colosseum.