The historical figure known for their role in the signing of the Magna Carta is King John of England. The Magna Carta, signed in 1215, was a pivotal document that limited the powers of the monarchy and established certain legal rights for citizens. It arose from the grievances of the barons against King John, who was seen as a tyrant due to heavy taxation and arbitrary justice. The Magna Carta is often regarded as a cornerstone of constitutional law, influencing many democratic principles and subsequent legal documents. This agreement marked a significant step towards individual rights and the rule of law in England.