It has recently undergone some restoration so that you can now walk the entire circuit of its great stone curtain walls and explore its towers and dungeons. At one time public hangings were carried out there, witnessed by the townspeople gathered in the streets below. There is a graveyard within one of the towers, where some of those hanged are buried.
Lincoln has one of the four remaining original copies of the Magna Carta, the charter of liberties agreed between King John and the barons exactly 800 years ago, which enshrined the principle that the monarch had to act within the rule of law and gave rights to 'freemen'. It influenced the American constitution and even today it stands as an important symbol of liberty. It is now housed in a purpose-built vault within the Castle so that visitors can see it and learn its history.