Cadogan Hall is a 900 seat capacity concert hall on Sloane Terrace in Chelsea / Belgravia in the Royal Borough of Kensington and Chelsea, London, United Kingdom. Previously, the building was the First Church of Christ, Scientist, completed in 1907 to designs by the architect Robert Fellowes Chisholm. By 1996, the congregations had diminished dramatically and the building fell into disuse. Mohamed Fayed, the then owner of Harrods, had acquired the property, but Cadogan Estates Ltd (the property company owned by Earl Cadogan, whose ancestors have been the main landowners in Chelsea since the 18th century - the nearby Cadogan Square and Cadogan Place are also named after them) purchased the building in 2000. It is a Grade II listed building. The resident music ensemble at Cadogan Hall is the Royal Philharmonic Orchestra (RPO), the first permanent home for a London orchestra. Cadogan Estates offered the RPO the use of the hall as its principal venue in late 2001. The RPO gave its first concert as the resident ensemble of Cadogan Hall in November 2004. Since 2005, Cadogan Hall has also served as the venue for The Proms' Chamber Music concerts during Monday lunchtimes. Cadogan Hall also hosts The Proms' Saturday Matinees. Cadogan Hall has been used as a recording venue in the production of a recording of Mozart symphonies immediately after the performances occurred, in February 2006, with John Eliot Gardiner and the English Baroque Soloists. In 2009, art rock band Marillion recorded a concert there that was released on the album Live from Cadogan in 2011.