Gaston Leroux's story is set in the world-famous Paris Opera House.Many of Leroux's readers thought that such a building with its huge stage,famous chandelier,secret underground passages,and even an underground lake could not exist.However,the Paris Opera House actually has all these features!
There are seats for more than 2,000 people.In the back wall of the theater there are 'boxes' on each floor. Leroux chose Box 5,which really does exits.as the Phantom's private seat because it is near the exit