Clarence House has been the official residence of the heir apparent of who?
Clarence House Clarence House is a royal residence in London, situated on The Mall, in the City of Westminster. It is attached to St. James's Palace and shares the palace's garden. For nearly 50 years, from 1953 to 2002, it was home to Queen Elizabeth The Queen Mother. It has since been the official residence of Charles, Prince of Wales, and Camilla, Duchess of Cornwall.
Marlborough House Marlborough House, a Grade I listed mansion in St James's (City of Westminster, Inner London), is the headquarters of the Commonwealth of Nations and the seat of the Commonwealth Secretariat. It was built for Sarah Churchill, Duchess of Marlborough, the favourite and confidante of Queen Anne. For over a century it served as the London residence of the Dukes of Marlborough.