paragraph_text: Peter Hänsel (born 29 November 1770 in Leppe, Silesia Province; d. 18 September 1831 in Vienna) was a German-Austrian violinist and classical composer of almost exclusively chamber music. He has been recently viewed not only as the principal representative of the true quartet school of Joseph Haydn and Wolfgang Amadeus Mozart, but also the composer responsible for incorporating French and Polish influences into the Viennese classical style, thus serving as mediator between Germany, France and Poland.

paragraph_text: Ludwig Wenzel Lachnith (Prague, July 7, 1746 – Paris, October 3, 1820) was a Bohemian horn player and versatile composer influenced by Joseph Haydn and Ignaz Pleyel. Today he is chiefly remembered because of his adaptions of operas by Wolfgang Amadeus Mozart. The French composer and writer Hector Berlioz immortalized him in a diatribe in his autobiography.

paragraph_text: Franz Xaver von Wegele (29 October 1823 in Landsberg am Lech – 17 October 1897 in Würzburg) was a German historian, largely known for his studies on the history of Thuringia, Franconia and the University of Würzburg.

paragraph_text: Franz Xaver Wagenschön (1726, Littisch (aka "Littitsch, Liticze", ), near Jaroměř, north-eastern Bohemia – 1790, Vienna) was a German Bohemian painter of the Rococo and Neoclassical styles. His works are to be found in the Kunsthistorisches Museum of Vienna, in Graz and in Upper Austria.

paragraph_text: Wolfgang Amadeus Mozart completed his Symphony No. 41 in C major, K. 551, on 10 August 1788. The longest and last symphony that he composed, it is regarded by many critics as among the greatest symphonies in classical music.

paragraph_text: Bruno Hoffmann was born in Stuttgart, Germany, the son of a church music director. He was trained in piano and organ playing, but on encountering the "musical glasses" at age 16, his lifelong devotion to resurrecting this unearthly beauty was begun. He discovered and mastered the old repertoire for glass harp by Wolfgang Amadeus Mozart, Johann Friedrich Reichardt, Karl Leopold Röllig, Johann Abraham Peter Schulz, Johann Gottlieb Naumann and others, and also inspired several modern composers to write new works for him.

paragraph_text: The comet was discovered  March 25, 1811 by Honoré Flaugergues at 2.7 AU from the Sun in the now-defunct constellation of Argo Navis. After being obscured for several days by moonlight, it was also found by Jean-Louis Pons on April 11, while Franz Xaver, Baron Von Zach was able to confirm Flaugergues' discovery the same night.The first provisional orbit was computed in June by Johann Karl Burckhardt. Based on these calculations, Heinrich Wilhelm Matthäus Olbers made a prediction that the comet would go on to become extremely bright later that year.

paragraph_text: Franz Xaver Pecháček (4 July 1793 in Vienna – 15 September 1840 in Karlsruhe) was an Austrian-German violin virtuoso and composer of Bohemian origin. Besides polonaises, variations, Rondos and potpourris for violin and orchestra, he composed two string quartets and the "Adagio et Polonaise" for clarinet and orchestra.

paragraph_text: Franz Xaver Gruber (25 November 1787 – 7 June 1863), was an Austrian primary school teacher, church organist and composer in the village of Arnsdorf, who is best known for composing the music to "Stille Nacht" ("Silent Night").

paragraph_text: Wolfgang Amadeus Mozart (/ ˈwʊlfɡæŋ æməˈdeɪəs ˈmoʊtsɑːrt / MOHT - sart; German: (ˈvɔlfɡaŋ amaˈdeːʊs ˈmoːtsaʁt); 27 January 1756 -- 5 December 1791), baptised as Johannes Chrysostomus Wolfgangus Theophilus Mozart, was a prolific and influential composer of the Classical era.

paragraph_text: Wolfgang Amadeus Mozart's six sonatas for keyboard with accompaniment of violin (or flute) and cello, K. 10–15 were composed in late 1764 in London during the Mozart family's grand tour of Europe. Queen Charlotte (the wife of King George III) commissioned them on 25 October and the works were dedicated on 18 January 1765. They were published as Mozart's "Opus III" by his father Leopold at 20 Frith Street, Soho, London, where the Mozarts lived from September 1764 until after May 1765.

paragraph_text: Franz Xaver Wolfgang Mozart (26 July 1791 – 29 July 1844), also known as Wolfgang Amadeus Mozart, Jr., was the youngest child of six born to Wolfgang Amadeus Mozart and his wife Constanze. He was the younger of his parents' two surviving children. He was a composer, pianist, conductor, and teacher from the late classical period whose musical style was of an early Romanticism, heavily influenced by his father's mature style.

paragraph_text: Wolfgang Amadeus Mozart's String Quartet No. 15 in D minor, K. 421/417b is the second of the Quartets dedicated to Haydn and the only one of the set in a minor key. Though undated in the autograph, it is believed to have been completed in 1783, while his wife Constanze Mozart was in labour with her first child Raimund. Constanze stated that the rising string figures in the second movement corresponded to her cries from the other room.

paragraph_text: Luise Willer (1888–1970) was a German operatic contralto. She made her professional opera debut in 1910 as Annius in Wolfgang Amadeus Mozart's "La clemenza di Tito". She spent most of her career performing at the Bavarian State Opera in Munich. At the Bayreuth Festival, she portrayed Brängane in "Tristan und Isolde". She created roles in several world premieres during her career, including Barbara in Erich Wolfgang Korngold's "Violanta" (1916), Lukrezia in Hans Pfitzner's "Palestrina" (1917), Graben-Liese in Franz Schreker's "Das Spielwerk" (1920), and Herzogin in Pfitzner's "Das Herz" (1931) among others.

paragraph_text: Wolfgang Amadeus Mozart's Piano Sonata No. 6 in D major, K. 284 / 205b, (1775) is a sonata in three movements:

paragraph_text: Mozart's birthplace (German: ' or ') was the birthplace of Wolfgang Amadeus Mozart at No. 9 Getreidegasse in Salzburg, Austria. The Mozart family resided on the third floor from 1747 to 1773. Mozart himself was born here on 27 January 1756. He was the seventh child of Leopold Mozart, who was a musician of the Salzburg Royal Chamber.

paragraph_text: The best - known composers from this period are Joseph Haydn, Wolfgang Amadeus Mozart, Ludwig van Beethoven, and Franz Schubert; other notable names include Luigi Boccherini, Muzio Clementi, Antonio Salieri, Leopold Mozart, Johann Christian Bach, Carl Philipp Emanuel Bach, and Christoph Willibald Gluck. Ludwig van Beethoven is regarded either as a Romantic composer or a Classical period composer who was part of the transition to the Romantic era. Franz Schubert is also a transitional figure, as were Johann Nepomuk Hummel, Luigi Cherubini, Gaspare Spontini, Gioachino Rossini, and Carl Maria von Weber. The period is sometimes referred to as the era of Viennese Classic or Classicism (German: Wiener Klassik), since Gluck, Mozart, Haydn, Salieri, Schubert, and Beethoven all worked in Vienna.

paragraph_text: Wolfgang Amadeus Mozart was born on 27January 1756 to Leopold Mozart (1719–1787) and Anna Maria, née Pertl (1720–1778), at 9 Getreidegasse in Salzburg. This was the capital of the Archbishopric of Salzburg, an ecclesiastic principality in what is now Austria, then part of the Holy Roman Empire. He was the youngest of seven children, five of whom died in infancy. His elder sister was Maria Anna Mozart (1751–1829), nicknamed "Nannerl". Mozart was baptised the day after his birth, at St. Rupert's Cathedral in Salzburg. The baptismal record gives his name in Latinized form, as "Joannes Chrysostomus Wolfgangus Theophilus Mozart". He generally called himself "Wolfgang Amadè Mozart" as an adult, but his name had many variants.

paragraph_text: Joseph Lange (Würzburg, 1 April 1751 – Vienna, 17 September 1831) was an actor and amateur painter of the 18th century. Through his marriage to Aloysia Weber, he was the brother-in-law of Wolfgang Amadeus Mozart.

paragraph_text: Prince Clemens Wenceslaus of Saxony (German: "Clemens Wenzeslaus August Hubertus Franz Xaver von Sachsen") (28 September 1739 – 27 July 1812) was a German prince from the House of Wettin and the Archbishop-Elector of Trier from 1768 until 1803, the Prince-Bishop of Freising from 1763 until 1768, the Prince-Bishop of Regensburg from 1763 until 1769, and the Prince-Bishop of Augsburg from 1768 until 1812.

Question: Who was the father of Franz Xaver Wolfgang Mozart's dad?
Answer: Leopold Mozart