The document outlines 5 main stage types used in theatre: the proscenium arch stage where the audience sits on one side facing the stage; the thrust stage where the audience surrounds the stage on 3 sides for more intimacy; the arena stage where the audience encircles the stage on all 4 sides; the traverse stage where the audience sits on 2 opposite sides facing each other across a longer acting area; and the flexible stage which developed in the 20th century as a large black box room that can be configured in different ways.