Curator Deborah Clarke, holds a casket presented to Queen Elizabeth the Queen Mother in 1938, part of the Royal Collection on display at the Queens Gallery on March 13, 2012 in Edinburgh, Scotland. The exhibition, which marks Her Majesty The Queen's Diamond Jubilee, reflects the tastes of monarchs and other members of the royal family who have shaped one of the world's great art collections. (Photo by Jeff J. Mitchell/Getty Images)

Curator holds a Minature of Mary, Queen of Scots, part of the Royal Collection on display at the Queens Gallery on March 13, 2012 in Edinburgh, Scotland. (Photo by Jeff J. Mitchell/Getty Images)

A member of staff at the Queens Gallery views a painting in the Royal Collection on March 13, 2012 in Edinburgh, Scotland. (Photo by Jeff J. Mitchell/Getty Images)

Alice Ross views a gold crown which was presented to Queen Victoria, part of the Royal Collection on display at the Queens Gallery on March 13, 2012 in Edinburgh, Scotland. (Photo by Jeff J. Mitchell/Getty Images)

Stephen Webster, Exhibition co-ordinator, stands next to the painting Agatha Bas by Rembrandt, part of the Royal Collection on display at the Queens Gallery on March 13, 2012 in Edinburgh, Scotland. (Photo by Jeff J. Mitchell/Getty Images)