Odeon of Herodes Atticus, Athens, Greece, 2017.10.10
Odeon of Herodes Atticus, Athens, Greece, 2017.10.10.
Nikon D7200, 12-24mm f/4G lens @14mm f/8, aperture priority.

"The audience stands and the orchestra (stage) were restored using pentelic marble in the 1950s. Since then it has been the main venue of the Athens Festival, which runs from May through October each year, featuring a variety of acclaimed Greek as well as International performances."

Wikipedia