A "Tree of Life" art piece presented to Britain's Queen Elizabeth II by Mexican President Enrique Peña Nieto during a state visit in March 2015 is shown at Buckingham Palace in London on Thursday. /CFP Photo

Britain is putting gifts Queen Elizabeth II received from world leaders on display at a "Royal Gifts" exhibition at Buckingham Palace. /CFP Photo

The remarkable collection includes over 200 gifts received during her 65-year reign. /CFP Photo

The gifts will be on display from July 22 to October 1, at this year's Summer Opening of the State Rooms at Buckingham Palace. /CFP Photo