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Greek theater 
Open-air structure, often built on a hillside, where theatrical performances were staged during antiquity.
entrance for the public
tiers
Stone benches arranged in tiers and used to seat the audience.
entrances for the actors
Doors used by the actors to go to and from the backstage area and the stage.
scene
Building that enclosed the stage and served as a backstage area for performers.
orchestra
Space where the choir performed.
stage
Platform where the actors performed.
