A proscenium is the part of a theater stage that is framed by the proscenium arch, which separates the stage from the audience. This architectural feature creates a "picture frame" effect, allowing the audience to view the performance as if it were a painting. The proscenium stage is designed to focus attention on the action taking place in front of it. In a proscenium theater, the audience typically sits in a straight line facing the stage, which enhances visibility and acoustics. This setup is common in many traditional theaters and is often used for plays, musicals, and other performances. The proscenium stage allows for elaborate sets and backdrops, contributing to the overall theatrical experience.