The Archbishop of Canterbury, British prime minister David Cameron, Queen Elizabeth II, Prince Philip, Prince William, Princess Anne, and Timothy Lawrence attend a commemoration of the 800th anniversary of the signing of the Magna Carta on June 15, 2015 at Runnymede, a water-meadow near Windsor Castle.
England's King John signed the Magna Carta, or Great Charter, at Runnymede on June 15, 1215 (depicted below in an 19th century illustration).