The significant political document signed in 1215 in England is the Magna Carta. This charter, agreed upon by King John of England and a group of rebel barons, established the principle that everyone, including the king, was subject to the law. It aimed to limit the power of the monarchy and protect the rights of the aristocracy. The Magna Carta is often regarded as a foundational text for modern democracy, influencing the development of constitutional law and the establishment of individual liberties, and is a symbol of the struggle for freedom against tyranny.