How many bricks?

View of a model of the Sydney Opera House, showing the buldings with their iconic sails, as well as the surrounding concourses, steps and walkways, a model of the Sydney Harbour Bridge behind, with greenery behind. (opens in a new window)

Image credit: John West

Prompt

How many bricks might be needed to build this model of the Sydney Opera House?

Download image (opens in a new window)