LONDON, ENGLAND - FEBRUARY 02:  A visitor looks at one of the four copies of the Magna Carta on display at the British Library on February 2, 2015 in London, England. Magna Carta, one of the world's most influential documents, is an agreement granted by King John in 1215 as a practical solution to a political crisis, which in the centuries since has become a potent symbol of liberty and the rule of law. The British Library, Lincoln Cathedral and Salisbury Cathedral have brought those four original surviving Magna Carta manuscripts together in one place, for the first time as part of a year of international celebrations to mark the 800th anniversary of the issue of the Charter by King John in 1215.  (Photo by Peter Macdiarmid/Getty Images)