The Odeon of Herodes Atticus is a stone theatre structure located on the southwest slope of the Acropolis of Athens, It was built in 161 AD by the Athenian magnate Herodes Atticus in memory of his wife Annia Regilla, Athens, Greece. The odeon had thirty-two rows of seating and accommodated some five thousand people. It was built similar to Roman theaters, with a semi-circular orchestra paved with black and white tiles. A cedar roof was built over the theater, improving the acoustics. The roof had no support columns, at the time quite an architectural achievement. The building’s large facade had four arched stories, three of which are still partially visible. Niches contained statues of the nine muses.
credit: Following Hadrian