In 465 BC, the playwrights began using a backdrop or scenic wall, which hung or stood behind the orchestra, which also served as an area where actors could change their costumes. It was known as the "skênê" (scene). In 425 BC a stone scene wall, called a "paraskenia", became a common supplement to "skênê" in the theatres. The proskenion ("in front of the scene") was columned, and was similar to the modern day proscenium.