Question: What Shakespeare's play had music composed by Felix Mendelssohn, featuring one of the most frequently used wedding marches, generally being played on a church pipe organ?
Context: Felix Mendelssohn's "Wedding March" in C major, written in 1842, is one of the best known of the pieces from his suite of incidental music (Op. 61) to Shakespeare's play "A Midsummer Night's Dream".  It is one of the most frequently used wedding marches, generally being played on a church pipe organ. The University of Music and Theatre "Felix Mendelssohn Bartholdy" Leipzig (German: "Hochschule für Musik und Theater "Felix Mendelssohn Bartholdy" Leipzig" ) is a public university in Leipzig (Saxony, Germany).  Founded in 1843 by Felix Mendelssohn as the "Conservatory of Music", it is the oldest university school of music in Germany. A barrel organ (or roller organ) is a mechanical musical instrument consisting of bellows and one or more ranks of pipes housed in a case, usually of wood, and often highly decorated.  The basic principle is the same as a traditional pipe organ, but rather than being played by an organist, the barrel organ is activated either by a person turning a crank, or by clockwork driven by weights or springs.  The pieces of music are encoded onto wooden barrels (or cylinders), which are analogous to the keyboard of the traditional pipe organ.  A person (or in some cases, a trained animal) which plays a barrel organ is known as an organ grinder. "Grace Darling" is a song by English band Strawbs, featured on their album "Ghosts" (recorded 1974, released 1975).  The track was recorded in the chapel of the Charterhouse School, Godalming, Surrey, which the members of the band Genesis had attended in the 1960s, and which Strawbs' producer at the time, Tom Allom, had also attended.  According to Dave Cousins, the chapel's pipe organ was used, played by the school organist, Alastair Ross; the band's keyboardist, John Hawken, did not play on the recording, as he was not used to the very noticeable delay that falls between the pressing of a key on a pipe organ and the sounding of the corresponding note.  Choral accompaniment was provided by the school choir. Orgelkids (Dutch, "organkids") is an educational project meant to familiarize and educate children with the pipe organ musical instrument.  The project was initiated in the Netherlands in 2009 by Lydia Vroegindeweij and is directed towards cultural legacy and music education.  Initially the project consisted of a website with educational tips and lesson suggestions to organize, among other projects, an excursion to a large pipe organ.  Since 2013, Orgelkids has at its disposal a speciallly developed educational organ assembly kit.  A complete, craftsman-built organ, in unassembled component parts, is contained in a lesson box.  The instrument can be assembled and subsequently played.  This so-called Do-organ is rented out by Orgelkids to organists, organ builders or organ teachers who want to organize educational projects for children. A Tibia Clausa is a type of pipe organ pipe.  It is a large-scale, stopped wood flute pipe, usually with a leathered lip.  The rank was invented by Robert Hope-Jones.  Tibia Clausas provides the basic foundation tone of the organ with few overtones or harmonics.  The Tibia Clausa is arguably the most important rank of pipes in a theatre pipe organ, with some organs having as many as 5.  The stop shares similarities with the "Bourdon" and the "Gedackt" found in some church pipe organs.  In the 18th and 19th centuries, Tibia Clausa was sometimes used as an alternate name for Doppelflöte.  Most tibias are made from wood, as by Wurlitzer etc., although examples of metal tibias may be found made by the John Compton Organ Company. Felix Mendelssohn’s Hawaiian Serenaders (also Felix Mendelssohn And His Hawaiian Serenaders), was a popular Hawaiian music band started by Felix Bartholdy Mendelssohn (19 September 19114 February 1952), is best known for making Hawaiian music popular in England and throughout Europe during the late 1930s and throughout the 1940s. Georges Montalba was the pseudonym used by pipe organist Robert Hunter (April 14, 1929 – September 10, 2001), a resident of Glendale, California, United States.  In 1958 Hunter/Montalba recorded "Pipe Organ Favorites & Fantasy in Pipe Organ and Percussion" at Lorin Whitney Studios for Somerset Stereo-Fidelity Records.  Both albums were later reissued on CD on the Hit Thing label.  Robert Hunter later went on to work with George Burns and Carol Channing on Broadway. At two separate times, Felix Mendelssohn composed music for William Shakespeare's play, "A Midsummer Night's Dream".  First in 1826, near the start of his career, he wrote a concert overture (Op. 21).  Later, in 1842, only a few years before his death, he wrote incidental music (Op. 61) for a production of the play, into which he incorporated the existing Overture.  The incidental music includes the world-famous "Wedding March".  The German title reads "Ein Sommernachtstraum". The symphonic organ is a style of pipe organ that flourished during the first three decades of the 20th century in town halls and other secular public venues, particularly in the United States and the United Kingdom.  It is a variation of the classical pipe organ – expanded with many pipes imitative of orchestral instruments, and with capabilities for seamlessly increasing and decreasing volume.  These expansions are intended to facilitate the expressive performance of Romantic music and orchestral transcriptions.  (These are classical orchestral works re-scored for a solo organist, a popular practice before technology allowed orchestras to be widely recorded and broadcast.)  The symphonic organ has seen a revival in the US, Europe and Japan, particularly since the 1980s.
Answer: A Midsummer Night's Dream