Parsifal

Parsifal is an opera, or music drama, in three acts by Richard Wagner. It is loosely based on Wolfram von Eschenbach's Parzival, the medieval (13th century) epic poem of the Arthurian knight Parzival (Percival) and his quest for the Holy Grail. During the first Act, Parsifal, an apparently witless fool, sees the suffering of the wounded Amfortas, King of an order of knights who guard the Grail. In the second Act Parsifal wanders into the domain of Klingsor, a magician who is trying to corrupt the Knights of the Grail and who has stolen from them the spear used to pierce Jesus Christ during his crucifixion. There Parsifal meets Kundry, the slave of Klingsor, who attempts to seduce him. In resisting her, he destroys Klingsor, and recovers the Spear. In the third Act, Parsifal returns to the Grail Kingdom to heal Amfortas.
See more at Wikipedia.org...

{Wolfram von Eshenbach}