《帕西法尔》是华格纳最后一部歌剧，也是男主角的名字。帕西法尔的故事情节与中世纪的圣杯传说密不可分。这部歌剧虽然充满了基督教的仪式情节与传说，然而其剧本的重要主题，却接近普世皆然的价值“慈悲”、“同理心”、愿意向善却受到恶辖制的心灵拉扯。

华格纳创作这部歌剧所参考的素材，最主要来自艾申巴哈的沃夫朗（Wolfram von Eschenbach）这位中世纪德语诗人的传奇作品，叙述帕西法尔通过考验成为“纯全的骑士”的过程。华格纳的歌剧则将帕西法尔的传说，改写成一个人通过考验成圣的过程。

Parsifal (WWV 111) is an opera in three acts by Richard Wagner. It is loosely based on Parzival by Wolfram von Eschenbach, a 13th-century epic poem of the Arthurian knight Parzival (Percival) and his quest for the Holy Grail (12th century).

Wagner first conceived the work in April 1857 but did not finish it until twenty-five years later. It was Wagner's last completed opera and in composing it he took advantage of the particular acoustics of his Bayreuth Festspielhaus. Parsifal was first produced at the second Bayreuth Festival in 1882. The Bayreuth Festival maintained a monopoly on Parsifal productions until 1903, when the opera was performed at the Metropolitan Opera in New York.