The Panathenaic Stadium, located in Athens, Greece, is a historic site known for its unique design and significance in ancient sports. Originally built in 330 BC for the Panathenaic Games, it was reconstructed in marble for the modern Olympic Games in 1896, making it the only stadium in the world built entirely of marble. The stadium has a capacity of around 45,000 spectators and features a U-shaped layout. It served as the venue for various athletic events, including running and wrestling. Today, the Panathenaic Stadium is a popular tourist attraction and a symbol of Greece's rich sporting heritage.