The document signed in 1215 that limited the power of the king in England is known as the Magna Carta. This charter was created during a time of political conflict between King John and his barons, who sought to curtail the king's arbitrary power and protect their rights. The Magna Carta established principles such as due process and the idea that the king was subject to the law rather than above it. Although initially a practical solution to a specific conflict, its enduring legacy has made it a foundational document in the development of constitutional law and democracy, influencing many legal systems around the world.