The Odeon of Herodes Atticus stands as a breathtaking masterpiece of Roman-era architecture on the southwest slope of the Acropolis. Its steep, semi-circular stone cavea with its 39 rows of pristine marble seating could accommodate up to 5,000 spectators, curving gracefully down to a striking checkered marble orchestra. Completed in AD 161 by the wealthy Athenian benefactor Herodes Atticus in memory of his beloved wife, Regilla, the historic theater features an imposing, three-story stone facade punctuated by grand arched windows. Today, this iconic venue remains fully active, serving as the premier open-air stage for the prestigious Athens Epidaurus Festival.