odeum
An odeum, also spelled odeion, is a small theatre or concert hall in ancient Greece and later in the Roman world, used for musical performances, poetry, and recitations. The term derives from Greek ōdeion, from aoide meaning "song." Odeums were typically roofed structures designed to protect performers and audiences from the sun, often semicircular or horseshoe-shaped, with a stage and a seating area arranged in tiers around a shallow orchestra.
In design, odea were smaller than the larger open-air theatres and were often freestanding or attached to
Use and function: Odeums hosted musical contests, recitals, and other cultural events, including gatherings and sometimes
Notable examples: The best-known surviving odeum is the Odeon of Herodes Atticus in Athens, built in 161
Modern usage: The word is also used for small concert halls or music venues in modern Greece