In 2012 the "Lincoln Castle Revealed" project, a three-year programme of renovation, began at the castle. Work involved creating a new exhibition centre in which to display Lincoln's copy of Magna Carta, building visitor facilities, and opening sections of the prison within the castle to the public. The scheme was completed in April 2015 to coincide with the 800th anniversary of the sealing of Magna Carta. The Lincoln Castle Magna Carta is one of the four surviving originals, sealed by King John after his meeting with the Barons at Runnymede in 1215, and is accompanied by an exhibition explaining the origin of the Magna Carta and its far-reaching effects.