Concert halls are large indoor spaces used for live performances, such as music concerts. ODEA (4 letters) is a type of concert hall that is typically found in ancient Greek and Roman architecture. VENUES (6 letters) are places where events are held, such as concerts. ODEONS (6 letters) are large, open-air theaters that were popular in Ancient Greece and Rome. TIERED (6 letters) refers to the multiple levels of seating found in many concert halls. ECHO (4 letters) is an acoustic effect that is often used in concert halls to enhance the sound of the performance. BATONS (6 letters) are long sticks used by conductors to lead orchestras and other musical ensembles.