The English charter of liberty was signed by King John, under duress, he was forced into signing the document at Runnymede June 15, 1215, which reduced his power as king.
"The content of the Magna Carta was drafted by Archbishop Stephen Langton and the most powerful Barons of England. King John signed the document which was originally called the 'Articles of the Barons' on June 10, 1215. The barons renewed the Oath of Fealty to King John on June 15, 1215. The royal chancery produced a formal royal grant, based on the agreements reached at Runnymede, which became known as Magna Carta. Copies of the Magna Carta were distributed to bishops, sheriffs and other important people throughout England".