The Panathenaic Stadium or Kallimarmaro is a multi-purpose stadium in Athens, Greece. One of the main historic attractions of Athens, it is the only stadium in the world built entirely of marble. A stadium was built on the site of a simple racecourse by the Athenian statesman Lykourgos c. 400 BC, primarily for the Panathenaic Games. It was rebuilt in marble by Herodes Atticus, an Athenian Roman senator, by 144 AD it had a capacity of 50,000 seats.