As long as I've been alive, Queen Elizabeth has been the crown head of Great Britain. Although it is largely a ceremonial and symbolic position of power, the British Monarchy still has some clout and is greatly respected by most people living there. She's been queen quite a while, as a recent E-Mail from a friend illustrated with a series of pictures.
Not long ago President Obama visited the Queen of England and gave her a few shoddy gifts, including an I-Pod stocked with his own speeches. But the Queen is quite used to American presidents visiting and coming to America to visit presidents:
President Ford hosted the Queen at the US Bicentennial celebration (pictured here), but never made it to England to be a guest at her palace. I gotta say he looks really dignified in that outfit, almost like a founding father. Too bad Ford was basically a schmuck.
Note that there's a break of sorts here. Queen Elizabeth never met with Lyndon Baines Johnson, one of the worst, and most corrupt, US presidents in history. The Queen was pregnant with Prince Edward when JFK's funeral took place, or she might have met LBJ then, but she wasn't able to make it.
That's Twelve different presidencies Elizabeth has been Queen across, a constant in England through five decades of changes and events. Through it all, Queen Elizabeth has been a steaedy image of class, dignity, and love for her country and people. One day she won't be queen any longer, and she will be missed because that ass Charles will probably take the throne at that point.