epitheatron (ἐπιθέατρον) : ep-ih-THEY-ah-tron

(Greek: upper tier of theatron seating). Audience seating in theatron above the diazoma. Corresponds to the Roman “summa cavea.” The koilon (seating area) in large, and in some medium-sized theatres, was subdivided into upper and lower seating tiers: the lower tier was known as the theatron proper and the upper tier was known as the epitheatron . A horizontal walkway (diazoma) separated the two seating tiers.