1215. There is actually a lesser known document called the "Charter of Liberties" from 1100. It was entirely ignored but was critical influence for the Magna Carta.
The Magna Carta was also basically ignored, but was utterly critical for the English Bill of Rights, which really has been followed, till this day.
And you can make out that (parts of( the US Declaration of Independence was also ignored: "We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty, and the Pursuit of Happiness.". Just ask any slave living under that constitution!
