Sailing at the 2004 Summer Olympics the racing was organized at the Agios Kosmos Marina at the coastal area of Southern Attica some 14 km south of Athens city centre and close to the old airport. This harbor was built in the 1960s but for the 2004 Summer Games it was completely reconstructed to form the Agios Kosmas Olympic Sailing Centre. The Agios Kosmas Olympic Sailing Centre was completed on 31 January 2004. On clear day the Acropolis could be seen from the course areas. During the 2004 Summer Olympics sixty one countries competed in the Olympic sailing regattas. Australia, France, Italy, Great Britain, Greece, Spain
Summer Olympic Games Australia (1956, 2000) and Brazil (2016). Africa has yet to host a Summer Olympics. Stockholm, Sweden, has hosted events at two Summer Olympic Games, having been sole host of the 1912 Games, and hosting the equestrian events at the 1956 Summer Olympics (which they are credited as jointly hosting with Melbourne, Australia). Amsterdam, Netherlands, has also hosted events at two Summer Olympic Games, having been sole host of the 1928 Games and previously hosting two of the sailing races at the 1920 Summer Olympics. At the 2008 Summer Olympics, Hong Kong provided the venues for the equestrian events, which took