The Lincoln Castle was begun by the order of William the Conqueror in 1086. It was one of the first castles built by the Normans and the major castle in Lincoln. It was built on a pre-existing Roman fortress and has a prison and a law court. It is also considered one of the better preserved castles in the country.
During the Medieval times, William the Conqueror saw the vulnerability of his position and ordered castles to be established in his name. The current castle has a unique design with two mottes. Lincoln Castle, then, became a stage for the battle between King Stephen and Empress Maud in the struggle for the crown. Years after that, it witnessed another battle as it became the stage for the Second Battle of Lincoln, leading to the signing of the Magna Carta. After the medieval period, the castle became a secure site for prison.
At the present, Lincoln Castle is the home to one of the original copies of the Magna Carta. The castle became a scheduled ancient monument. Its grounds were used for concerts while the old prison is now converted into a museum. It also offers visitors a great view over the surrounding countryside.