The significance of the Magna Carta to the development of constitutional law lies in its establishment of the principle that no one, not even the king, is above the law. Signed in 1215, the Magna Carta introduced concepts such as due process, the right to a fair trial, and the idea that arbitrary power is limited. It served as a foundational document influencing later constitutional developments, including the English Bill of Rights and the United States Constitution. Its legacy inspires democratic ideals and principles of governance worldwide, emphasizing the necessity of checks and balances within governmental systems and the protection of individual liberties.