Photo taken on March 29, 2021 shows the Panathenaic Stadium at the center of Athens, Greece, during a ceremony organised by the Hellenic Olympic Committee. A new lighting system installed at Athens' Panathenaic stadium was unveiled on Monday evening. The marble main venue of the first modern Olympic Games of 1896 is now illuminated with thousands of LED bulbs to reduce light pollution and save energy. (Photo by Lefteris Partsalis/Xinhua)
