Julien, ou La vie du poète ("Julien, or The Poet’s Life") is a poème lyrique or opera by composer Gustave Charpentier.
 The work is devised in a prologue and four acts and uses a French libretto by the composer.
 "Julien" is a sequel to Charpentier's "Louise" (1900) and describes the artistic aspirations of Louise’s suitor Julien.
 The opera premiered in Paris at the Opéra-Comique on 4 June 1913.
Ludwig van (full title: "Ludwig van: A report"; German: "Ludwig van: ein Bericht") is a black-and-white German film by Mauricio Kagel.
 Filmed in 1969, it was first screened the following year.
 The work was commissioned by Westdeutscher Rundfunk for the bicentennial celebrations of the birth of Ludwig van Beethoven in 1970.
 The film examines the reception of the composer and his works and how he has become a consumer product of the culture industry.
 The soundtrack is an arrangement of fragments of Beethoven's works, modified as if heard by the deaf composer himself; it is distinct from Kagel's 1970 composition "Ludwig van".
 Prominent contemporary artists including Dieter Roth, Stefan Wewerka (), Robert Filliou, and Joseph Beuys were involved in the design.
 According to "Gramophone", "at first it’s a laugh a minute ... then Kagel's film turns dark".
Ludwig van Beethoven is a series of sculptures of Ludwig van Beethoven by German-American sculptor Henry Baerer.
 Versions are displayed in Central Park in New York City, Golden Gate Park in San Francisco, and Prospect Park in Brooklyn.
 The sculpture in Central Park was dedicated on July 22, 1884.
 It includes two bronze statues, including a bust of Beethoven and an allegorical female figure on a polished Barre Granite pedestal.
The Beethoven "Gesamtausgabe" is the first collected edition of the works of Ludwig van Beethoven.
 Its full title is "Ludwig van Beethovens Werke: vollständige kritisch durchgesehene überall berechtige Ausgabe" (which roughly translated means "Ludwig van Beethoven's Works: complete, critical, thoroughly revised, authorized edition").
 It was published between 1862 and 1865, with a supplementary volume appearing in 1888.
Johann van Beethoven (c. 1739 or 1740 – 18 December 1792) was a German musician, teacher, and singer who sang in the chapel of the Archbishop of Cologne, whose court was at Bonn.
 He is best known as the father of the celebrated composer Ludwig van Beethoven (1770–1827).
Jacques Charpentier (October 18, 1933 in Paris, France – June 15, 2017 in Lézignan-Corbières) was a French composer and organist.
 He is unrelated to either of two other eminent French musicians with the same surname (Marc-Antoine Charpentier and Gustave Charpentier).
Gustave Charpentier (] ; 25 June 1860 – 18 February 1956) was a French composer, best known for his opera "Louise".
Ludwig van Beethoven the Elder, also Ludovicus van Beethoven and Lodewijk van Beethoven (January 5, 1712 – December 24, 1773) was a professional singer and music director, best known as the grandfather of the composer Ludwig van Beethoven.
Johanna van Beethoven (née Reiß [Reiss]; 1786–1869) was the sister-in-law of the composer Ludwig van Beethoven.
 She is remembered for the bitter custody battle between herself and the composer over her son Karl, one of the most ugly and traumatic episodes in the composer's life.
Ludwig van Beethoven ( , ; ] ; baptised 17 December 177026 March 1827) was a German composer and pianist.
 A crucial figure in the transition between the Classical and Romantic eras in Western art music, he remains one of the most famous and influential of all composers.
 His best-known compositions include 9 symphonies, 5 piano concertos, 1 violin concerto, 32 piano sonatas, 16 string quartets, his great Mass the "Missa solemnis", and one opera, "Fidelio".

Question: What composer was best known for his opera "Louise", Ludwig van Beethoven or Gustave Charpentier?
Answer: Gustave Charpentier