1902, from Greek oideion "building for musical performance."
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for odeon
Still, Odeon—one of Europe's largest chains—says it won't show the film on its screens in Britain, Ireland, and Italy.Has Disney Gone Mad?
February 24, 2010
This was the only time the Odeon was ever opened to Anti-Slavery.
It was the searchlight from the new Odeon theatre, she remembered.Stubble
They had just left the garden and found themselves behind the Odeon.
According to his ideas, Deborah, the tragedienne at the Odeon—a Greek statue!
Still following the chalk marks, Lecoq now reached the Odeon theatre.Monsieur Lecoq, v.1