Charlton Athletic Football Club is an English football club based in Charlton in the Royal Borough of Greenwich, London. They currently play in the Football League Championship.The club was founded on 9 June 1905. A number of youth clubs in the south east London area, including East Street Mission and Blundell Mission, combined to form Charlton Athletic. The club play at The Valley in Charlton, where they have played since 1919, apart from one year in Catford, during 1923–24, and seven years at Crystal Palace and West Ham United between 1985 and 1992. Charlton share local South London derbies with rivals Millwall and Crystal Palace.