Charlton Athletic Football Club is an English professional association football club based in Charlton, south-east London. They play in the Championship, the second tier of English football, after getting promoted through the play-offs in the 2018–19 season. The club was founded on 9 June 1905 when a number of youth clubs in south-east London, 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.