Answer:
One of the standard types of scenery, a permanent structure that does not represent a specific locale and remains in place throughout the performance, is called a "set piece" or "set element."
Step-by-step explanation:
Set pieces are large, often three-dimensional, scenic elements that are built as part of the stage design and provide a fixed backdrop or architectural structure for the play or performance. They can include structures such as walls, columns, arches, platforms, or other scenic elements that create the overall visual environment of the production. Set pieces are typically designed and constructed to serve multiple scenes or locations within a play, providing a consistent and cohesive backdrop for the performance.