Magna Carta - King John and the Great Charter
King John was not a very successful king. His great enemy was the King of France, but he also argued with and punished many English barons. After losing another battle against France many barons decided they had had enough. They gave him a choice: he must give them their rights or it would mean war.
The list they created was so long they called it 'Magna Carta', which means 'Great Charter'. King John finally agreed and put his seal to it at Runnymede, an island in the River Thames.