Backstage
Backstage is a space hidden from the audience on the sides and behind the stage.
It's always there for the machinists to operate during the show, to store costumes, props, flight-cases, and for quick costume changes. That's also the place where dancers wait and move around to prepare entering or to leave stage.
The dressing rooms located on both sides of the stage are equipped with big mirrors for dancers to have their makeup and hair done before the show. They are busy with dancers and dressers who prepare costumes or help dancers change costumes during the ballet.