The Odeon of Herodes Atticus (Greek: Ωδείο Ηρώδου του Αττικού; also called Herodeion or Herodion; Greek: Ηρώδειο) is a stone greek theatre structure located on the southwest slope of the Acropolis of Athens, Greece. The building was completed in AD 161 and then renovated in 1950.

From Wikipedia