Olympia is an exhibition centre, event space and conference centre in West Kensington, London, England.
Opened in 1886 as the National Agricultural Hall, it was built by Andrew Handyside and Company of Derby and covered an area of 4 acres (16,000 m2). The Grand Hall, 450 feet (140 m) in length, by 250 feet (76 m) in breadth, was said to be the largest building in the United Kingdom covered by one span of iron and glass.
It now features four event venues and a conference centre. The event venues are Olympia Grand (19,325m²), Olympia National (8,730m²), Olympia Central (formerly Two) (7,850m²) and Olympia West (7,688m²). Together with Earls Court, these facilities are operated by Earls Court & Olympia Ltd.
The nearest railway station is Kensington (Olympia) which is both a London Overground station and on the District line of the London Underground.
Original Source http://en.wikipedia.org/wiki/Olympia_%28London%29