38°2′19″N 23°47′9″E / 38.03861°N 23.78583°E
The Olympic Athletic Center of Athens Spiros Louis (Greek: Ολυμπιακό Αθλητικό Κέντρο Αθηνών "Σπύρος Λούης", Olympiakó Athlitikó Kéntro Athinón "Spýros Loúis") or OACA (OAKA)), is a sport facilities complex located at Marousi, in the north section of the city. The complex consists of five major venues as well as other supplementary sport facilities.
Santiago Calatrava Valls (born 28 July 1951) is a Spanish-Swiss architect, structural engineer, sculptor and painter, particularly known for his bridges supported by single leaning pylons, and his railway stations, stadiums, and museums, whose sculptural forms often resemble living organisms. His best-known works include the Olympic Sports Complex of Athens, the Milwaukee Art Museum, the Turning Torso tower in Malmö, Sweden, the World Trade Center Transportation Hub in New York City, the Auditorio de Tenerife in Santa Cruz de Tenerife, the Margaret Hunt Hill Bridge in Dallas, Texas, and his largest project, the City of Arts and Sciences and Opera House in his birthplace, Valencia. His architectural firm has offices in New York City, Doha, and Zurich.
The Hellinikon Olympic Complex is a closed, partially demolished sports complex, situated at Elliniko, a suburban town in the southern part of the Athens urban agglomeration, approximately 16 kilometres from the Olympic Village. It was built on the site of the former Hellinikon International Airport for the staging of the 2004 Summer Olympics and 2004 Summer Paralympics. It consists of five separate venues.