ATHENS, GREECE - NOVEMBER 4, 2017: Entrance to the Panathenaic Stadium, with the Olympic flag and the Greek flag in front. Also known as Kallimarmaro, it's one of the main landmarks of Ancient Athens.
Picture of the main entrance to the Panathenaic stadium in Athens, Greece. The Panathenaic Stadium or Kallimarmaro is a multi-purpose stadium in Athens, Greece. It is the only stadium in the world built entirely of marble.