Buckingham Palace is the monarch's principal state residence.
And at its heart is a proclamation of royal authority.
If you had to pick just one room
which encapsulates what Buckingham Palace represents,
it's this one.
The Throne Room.
And you're in no doubt where the seat of power lies.
The two chairs on a raised dais,
one for Queen Elizabeth the Second,
one for her consort, Prince Philip.
And you might pick
that the Queen has sat on that seat many times during her reign
and received dozens of heads of state here.
But you'd be wrong.
This room is purely symbolic,
and she's only sat on that chair the once,
at her coronation in 1953.