The legend of the Holy Grail is one of the most enduring in Western European literature and art. The Grail was said to be the cup of the Last Supper and at the Crucifixion to have received blood flowing from Christ's side. It was brought to Britain by Joseph of Arimathea, where it lay hidden for centuries. The search for the vessel became the principal quest of the knights of King Arthur. It was believed to be kept in a mysterious castle surrounded by a wasteland and guarded by a custodian called the Fisher King, who suffered from a wound that would not heal. His recovery and the renewal of the blighted lands depended upon the successful completion of the quest. Equally, the self-realisation of the questing knight was assured by finding the Grail.