Head of the Commonwealth

The head of the Commonwealth is the ceremonial leader of the Commonwealth of Nations, an intergovernmental organisation that is made up of 56 sovereign states.
Background.
In 1949, King George VI was king of each of the countries that then made-up the British Commonwealth (later the Commonwealth of Nations): the United Kingdom, Canada, Australia, New Zealand, South Africa, India, Pakistan, and Ceylon. 
The London Declaration, which was made in late April 1949, said that the King, as the symbol of the countries of the Commonwealth, was the head of the Commonwealth.