 Behind the orchestra was a low building called the "skênê", which served as a store-room, a dressing-room, and also as a backdrop to the action taking place in the orchestra.A number of Greek theatres survive almost intact, the best known being at Epidaurus by the architect Polykleitos the Younger.Greek towns of substantial size also had a palaestra or a gymnasium, the social centre for male citizens which included spectator areas, baths, toilets and club rooms.