The 1908 Summer Olympics, officially the Games of the IV Olympiad, were an international multi-sport event which was held in 1908 in London, England from 27 April to 31 October 1908. These games were originally scheduled to be held in Rome, but were re-located on financial grounds following a disastrous eruption of Mount Vesuvius in 1906. They were the fourth chronological modern Olympic Games in keeping with the now-accepted four-year cycle as opposed to the proposed Intercalated Games alternate four-year cycle. The IOC president for these Games was Baron Pierre de Coubertin. Lasting a total of 187 days, or 6 months and 4 days, these games were the longest in modern Olympics history.

The selection process for the 1908 Summer Olympics consisted of four bids, and saw Rome selected ahead of London, Berlin and Milan. The selection was made at the 6th IOC Session in London in 1904.

Italian authorities were preparing to hold the games when Mount Vesuvius erupted on 7 April 1906, devastating the city of Naples. Funds were diverted to the reconstruction of Naples, so a new venue was required. London was selected for the first time to hold the Games which were held at White City alongside the Franco-British Exhibition, at the time the more noteworthy event.

The White City Stadium, built in short time for the games, held 68,000 and was considered by some a technological marvel. The stadium track was three laps to the mile (536 metres), not the current standard of 400 metres, with a pool for swimming and diving and platforms for wrestling and gymnastics in the middle.

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