The 2004 Summer Olympic Games, officially known as the Games of the XXVIII Olympiad, were a premier international multi-sport event held in Athens, Greece, from 13 to 29 August 2004 with the motto Welcome Home. 10,625 athletes competed, some 600 more than expected, accompanied by 5,501 team officials from 201 countries. There were 301 medal events in 28 different sports. Athens 2004 marked the first time since the 1996 Summer Olympics that all countries with a National Olympic Committee were in attendance. It was also the first time since 1896 (other than the since-downgraded 1906 Intercalated Games) that the Olympics were held in Greece.