The stage opening is called the ____________

The stage opening is correctly referred to as the proscenium. This term describes the architectural frame or structure that surrounds the stage and separates it from the audience. The proscenium arch serves both a functional and aesthetic purpose, as it provides a clear delineation between the performance area and the viewing public, allowing the audience to become immersed in the spectacle of the production without interference.

The proscenium stage is characterized by its "picture frame" effect, which enhances the visual storytelling aspect of performances. This format is commonly used in many theatrical venues and provides a specific viewpoint for the audience, enhancing their experience of the play being performed.

The other terms listed serve different purposes within theatre: parenski is not a recognized term in theatre terminology, presidio generally refers to a military fortification, and thrust refers to a stage design where the acting area extends into the audience space, providing a more intimate setting. Understanding these distinctions emphasizes the importance of the proscenium in traditional theatrical settings.