Answer:
scaena – a roofed house at the back of the stage.
scaenae frons – front wall of the scaena that could be up to three stories high and often featured a balcony as well as three doors on the ground level.
pulpitum – The actual stage.
versurae – Wings of the stage that each feature an entrance.
orchestra – The area where dignitaries sat and where musicians and dancers sometimes performed.
cavea – large auditorium, round in shape, where all the commoners sat when they attended the theater.