The Olympic Stadium of Athens "Spyros Louis" (, "Olympiakó Stádio Athinon "Spyros Louis"") is a sports stadium in Athens, Greece. It is a part of the Athens Olympic Sports Complex and is named after the first modern Olympic marathon gold medalist in 1896, Spyros Louis. The stadium hosts two of the biggest sport clubs in Greece, Panathinaikos and AEK Athens. The stadium served as the main stadium during the 2004 Summer Olympics.