https://en.wikipedia.org/wiki/Panathenaic_Games
The athletic events were staged at the Panathenaic Stadium, which is still in use today.In 1865, Evangelis Zappas left a vast fortune in his will with instructions to excavate and refurbish the ancient Panathenaic stadium so that modern Olympic Games could be held every four years "in the manner of our ancestors". The Panathenaic Stadium has hosted Zappas Olympics in 1870, …