How do I know what the Colosseum looks like when I can’t see?

How do I know what the colosseum looks like when I can’t see anything? Video description: Lucy stands on the 2nd level of the Colosseum, about halfway round the circle from where you exit the museum section. There is a plaque next to her which has two raised diagrams. One is an orthographic view of a slice of the museum from the side, showing how the arches are stacked upon each other. The second is a bird’s eye view of the arena with the different seating sections raised.