Parsifal is an opera

Opera

Opera is an art form in which singers and musicians perform a dramatic work combining text and musical score, usually in a theatrical setting. Opera incorporates many of the elements of spoken theatre, such as acting, scenery, and costumes and sometimes includes dance...

 in three acts by Richard Wagner

Richard Wagner

Wilhelm Richard Wagner was a German composer, conductor, theatre director, philosopher, music theorist, poet, essayist and writer primarily known for his operas...

. It is loosely based on Wolfram von Eschenbach

Wolfram von Eschenbach

Wolfram von Eschenbach was a German knight and poet, regarded as one of the greatest epic poets of his time. As a Minnesinger, he also wrote lyric poetry.-Life:...

's Parzival

Parzival

Parzival is a major medieval German romance by the poet Wolfram von Eschenbach, in the Middle High German language. The poem, commonly dated to the first quarter of the 13th century, is itself largely based on Chrétien de Troyes’s Perceval, the Story of the Grail and mainly centers on the Arthurian...

, the 13th century epic poem

Epic poetry

An epic is a lengthy narrative poem, ordinarily concerning a serious subject containing details of heroic deeds and events significant to a culture or nation. Oral poetry may qualify as an epic, and Albert Lord and Milman Parry have argued that classical epics were fundamentally an oral poetic form...

 of the Arthurian knight Parzival (Percival

Percival

Percival or Perceval is one of King Arthur's legendary Knights of the Round Table. In Welsh literature his story is allotted to the historical Peredur...

) and his quest for the Holy Grail

Holy Grail

The Holy Grail is a sacred object figuring in literature and certain Christian traditions, most often identified with the dish, plate, or cup used by Jesus at the Last Supper and said to possess miraculous powers...

, and on Chrétien de Troyes

Chrétien de Troyes

Chrétien de Troyes was a French poet and trouvère who flourished in the late 12th century. Perhaps he named himself Christian of Troyes in contrast to the illustrious Rashi, also of Troyes...

' Perceval, the Story of the Grail

Perceval, the Story of the Grail

Perceval, the Story of the Grail is the unfinished fifth romance of Chrétien de Troyes. Probably written between 1181 and 1191, it is dedicated to Chrétien's patron Philip, Count of Flanders...

.

Wagner

Richard Wagner

Wilhelm Richard Wagner was a German composer, conductor, theatre director, philosopher, music theorist, poet, essayist and writer primarily known for his operas...

 first conceived the work in April 1857 but it was not finished until twenty-five years later. It was to be Wagner's last completed opera and in composing it he took advantage of the particular acoustics

Acoustics

Acoustics is the interdisciplinary science that deals with the study of all mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics...

 of his Bayreuth Festspielhaus

Bayreuth Festspielhaus

The or Bayreuth Festival Theatre is an opera house north of Bayreuth, Germany, dedicated solely to the performance of operas by the 19th-century German composer Richard Wagner...

.