In the heart of London sits one of Britain's most recognisable buildings.
Yet its story is one of the least understood.
Buckingham Palace is a building with a deep hold on the public imagination.
Not only is it the seat of the British monarchy and headquarters of royal affairs of state.
But also, thanks to its famous balcony,
it's become the national focus for great moments of commemoration and celebration.
But what is now the site of a splendid palace was once open countryside.
And behind the familiar facade lies a building with a strange and surprising history.
Shaped by successive monarchs who all had very different ideas of what it should be.