Proscenium theatre is a type of stage design where the audience faces the stage from one side, creating a "picture frame" effect. This setup allows for a clear separation between the performers and the audience, enhancing the visual experience. The proscenium arch, which is the frame around the stage, helps to focus attention on the action taking place. This style of theatre is commonly used in many theatre productions and is ideal for elaborate sets and lighting designs. It allows for a wide range of performances, from musicals to dramas, making it a popular choice for both professional and community theatres.