Britain's Queen Elizabeth II and Prince Philip pose with Barack and Michelle Obama during a state banquet at Buckingham Palace on Tuesday. (Chris Jackson/AP)

(The Obamas chat with Wills and Kate, the royal newlyweds. (Charles Dharapak/AP))

The queen presented Obama with letters (copies, actually) from the royal archives between Queen Victoria and several U.S. presidents; the first lady received an antique gold and coral brooch.

One more present: The Obamas donated six computers to the Northern Ireland chapter of PeacePlayers International, a D.C.-based charity sponsored by newlyweds Wills and Kate.