Clarence House is a royal home in London, situated in The Mall. It is adjacent to St. James's Palace and shares the palace's garden. For nearly 50 years from 1953 to 2002 it was home to HM Queen Elizabeth, the Queen Mother, but is now the official residence of The Prince of Wales, his second wife, HRH the Duchess of Cornwall and his sons, the princes William and Harry of Wales. It is open to visitors for approximately two months each summer, but tickets must be booked in advance.