Question: Which monument in Oberndorf bei Salzburg is dedicated to a Christmas carol that Franz Xaver Gruber is best known for composing? 

full_context: Document 1: Franz Xaver Gruber: 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").
Document 2: Silent-Night-Chapel: The Silent Night Chapel (Stille-Nacht-Kapelle) is located in the town Oberndorf bei Salzburg in the Austrian province of Salzburg and is a monument to the Christmas carol "Silent Night" and its librettist, Joseph Mohr and composer, Franz Xaver Gruber. It stands in place of the former St. Nicholas Church, where on 24 December 1818 the Christmas carol was performed for the first time.
Document 3: O Holy Night: "O Holy Night" (French: "Cantique de Noël" ) is a well-known Christmas carol composed by Adolphe Adam in 1847 to the French poem "Minuit, chrétiens" (Midnight, Christians) by a wine merchant and poet, Placide Cappeau (1808–1877).
Document 4: Johann Abraham Peter Schulz: Johann Abraham Peter Schulz (31 March 1747, Lüneburg – 10 June 1800,Schwedt) was a German musician. He is best known as the composer of the melody for Matthias Claudius's poem "Der Mond ist aufgegangen" and the Christmas carol "Ihr Kinderlein kommet".
Document 5: Placide Cappeau: Placide Cappeau (October 25, 1808 – August 8, 1877) was a French poet and the author of the well-known poem, "Minuit, chrétiens" ("O Holy Night") (1847), which was set to music by Adolphe Adam.
Document 6: Mykola Leontovych: Leontovych was born and raised in the Podolia Governorate of the Russian Empire (present-day Ukraine). He was educated as a priest in the Kamianets-Podilskyi Theological Seminary and later furthered his musical education at the Saint Petersburg Court Capella and private lessons with Boleslav Yavorsky. With the independence of the Ukrainian state in the 1917 revolution, Leontovych moved to Kiev where he worked at the Kiev Conservatory and the Mykola Lysenko Institute of Music and Drama. He is recognized for composing "Shchedryk" in 1904 (which premiered in 1916), known to the English-speaking world as "Carol of the Bells" or "Ring, Christmas Bells". He is known as a martyr in the Eastern Orthodox Ukrainian Church, where he is also remembered for his liturgy, the first liturgy composed in the vernacular, specifically in the modern Ukrainian language. He was assassinated by a Soviet agent in 1921.
Document 7: Silent Night (opera): Silent Night is an opera by composer Kevin Puts and librettist Mark Campbell. As Silent Night: Opera in Two Acts the work had its world premiere at the Ordway Theater, Saint Paul, Minnesota, on November 12, 2011 under the directorship and dramaturgy of Eric Simonson. As "Silent Night", the opera had its East Coast premiere at the Philadelphia Academy of Music on February 8, 2013. It premiered in the Southwest at Bass Performance Hall with Fort Worth Opera on May 4, 2014. The European premiere took place on October 24, 2014, at the Wexford Festival Opera in Ireland. In 2014 the work was staged at the Calgary Opera and the Cincinnati Opera, and in 2015 it was performed at the Opéra de Montréal and the Lyric Opera of Kansas City. It received its West Coast premiere at Opera San Jose on February 11th, 2017. The opera won the 2012 Pulitzer Prize for Music.
Document 8: Silent Night: "Silent Night" (German: "Stille Nacht, heilige Nacht" ) is a popular Christmas carol, composed in 1818 by Franz Xaver Gruber to lyrics by Joseph Mohr in the small town of Oberndorf bei Salzburg, Austria. It was declared an intangible cultural heritage by UNESCO in 2011. The song has been recorded by a large number of singers from every music genre. The version sung by Bing Crosby is the third best-selling single of all-time.
Document 9: O Holy Night (Jackie Evancho EP): O Holy Night is the official debut Christmas EP by American child singer Jackie Evancho. The album was released on November 16, 2010, only two months after Evancho rose to prominence as a finalist on the reality TV show "America's Got Talent". Evancho was ten years old when this EP was released.
Document 10: A Visit from St. Nicholas: "A Visit from St. Nicholas", more commonly known as "The Night Before Christmas" and "' Twas the Night Before Christmas" from its first line, is a poem first published anonymously in 1823 and later attributed to Clement Clarke Moore, who claimed authorship in 1837. Some commentators now believe the poem was written by Henry Livingston, Jr..
Document 11: Franz Schubert: Franz Peter Schubert (] ; 31 January 179719 November 1828) was an Austrian composer.
Document 12: Once in Royal David's City: Once in Royal David's City is a Christmas carol originally written as a poem by Cecil Frances Alexander. The carol was first published in 1848 in Miss Cecil Humphreys' hymnbook "Hymns for little Children". A year later, the English organist Henry John Gauntlett discovered the poem and set it to music. Cecil Humphreys, meanwhile, married the Anglican clergyman William Alexander in 1848 and upon her husband's consecration became a bishop's wife in 1867. She is also remembered for her hymn "All Things Bright and Beautiful".
Document 13: Singing Christmas Tree: A Singing Christmas Tree, sometimes called a Living Christmas Tree, is an artificial Christmas tree filled with singers used as part of nativity plays. First appearing in 1933 at Belhaven University, they later made their debut indoors at West High School in Denver, Colorado, and then in 1957 in Sacramento, California. Constructed of steel, the tree is actually a conical circular sector where between one-third and one-half of an actual Christmas tree is shown. Depending upon tree size, they can accompany between 30 and 450 singers. These trees can be put up by churches or communities depending upon the location. Since then, the singing Christmas tree concept has spread to Canada, the Philippines, South Korea, Switzerland and Sri Lanka. The most attended tree takes place in Knoxville, Tennessee, with 60,000 attendees in 2007.
Document 14: Joseph Parry's Cottage: Joseph Parry's Cottage, also known as 4 Chapel Row, is a cottage located in Merthyr Tydfil, in South Wales. Built in the early 19th century for ironworkers, the cottage is best known as the birthplace of the famous Welsh composer Joseph Parry (1841–1903). It is now open to the public as a museum.
Document 15: Carol of the Old Ones: "Carol of the Old Ones" is a song originally published in the 1988 HPLHS Solstice Carol Songbook, released by the H. P. Lovecraft Historical Society. With lyrics written by Andrew Leman, it is sung and performed to the tune of "Carol of the Bells" by Mykola Dmytrovych Leontovych (itself sung to the tune of Shchedryk), with soprano lead vocals and four-part harmony at various points in the song. The song is performed by The Dagon Tabernacle Choir; the performers' names are Rebecca Marcotte, Digby Dolmen, J.D. Titan, and Walter Forsythe. It can be found on the album "A Very Scary Solstice".
ground_truth: The Silent Night Chapel