In theatre, a shell is a curved, hard surface designed to reflect sound towards an audience.
The Gene Harris bandshell at Julia Davis Park in Boise, Idaho, a municipal example.
An image of the Lake Braddock Symphony Orchestra performing at District IX Festival, on March 18, 2006, at Centreville High School. Behind the orchestra is a simple shell.
Acoustic shell of the former Avenida cinema in San Luis Potosí, Mexico. It is now located in the parking lot of a restaurant
An amphitheatre is an open-air venue used for entertainment, performances, and sports. The term derives from the ancient Greek ἀμφιθέατρον, from ἀμφί, meaning "on both sides" or "around" and θέατρον,
Shell (theater)
…replaced in 1958 by a modern structure that thrived until its demolition in 2019, retaining its original name despite no longer being an acoustic shell. Amphitheatre Bandstand…
The Colosseum, an amphitheatre in Rome (built 72–80 AD)
Arles Amphitheatre, France: a Roman arena still used for bullfighting, plays, and summer concerts.