A proscenium stage is a type of theater stage that features a framed opening, known as the proscenium arch, which separates the audience from the performance area. This design creates a clear boundary between the actors and the viewers, allowing for a focused viewing experience. The stage is typically raised, providing better sightlines for the audience. In a proscenium theater, the audience faces the stage directly, which enhances the visual and auditory experience. This setup is commonly used in many traditional theaters and is ideal for elaborate sets and staging, making it a popular choice for productions like musicals and plays.