Clarence House has been the official residence of the heir apparent of who?
Charles, Prince of Wales Charles, Prince of Wales (Charles Philip Arthur George; born 14 November 1948) is the eldest child and heir apparent of Queen Elizabeth II. Known alternatively in Cornwall as Duke of Cornwall and in Scotland as Duke of Rothesay, he is the longest-serving heir apparent in British history, having held the position since 1952. He is also the oldest person to be next in line to the throne since Sophia of Hanover (the heir presumptive to Queen Anne), who died in 1714 at the age of 83.
Ancestry of Queen Elizabeth II Queen Elizabeth II, present sovereign of the Commonwealth realms, is the daughter of King George VI, the second son of King George V and Queen Mary; and of Lady Elizabeth Bowes-Lyon (later Queen Elizabeth, and, after her daughter's accession to the throne, the Queen Mother), the daughter of Claude Bowes-Lyon, 14th Earl of Strathmore and Kinghorne, and his wife, Cecilia Bowes-Lyon, Countess of Strathmore and Kinghorne.