Greece marks Int'l Day of Peace at Panathenaic stadium of Athens

Photo taken on Sept. 21, 2018 shows the main entrance at Panathenaic Stadium in Athens, Greece. On the occasion of the International Day of Peace, the Panathenaic Stadium, one of the main historic attractions of Athens, opened its gates to host a series of events on Friday. (Xinhua/Lefteris Partsalis)?