Cliveden (pronounced /ˈklɪvdən/) is an Italianate mansion and estate at Taplow, Buckinghamshire, England. Set on banks 40 metres (130 ft) above the River Thames, its grounds slope down to the river. The site has been home to an earl, three countesses, two dukes, a Prince of Wales and the Viscounts Astor.As home of Nancy Astor, the house was the meeting place of the Cliveden set of the 1920s and 1930s — a group of political intellectuals.