Silent Night (German: "Stille Nacht, heilige Nacht" ) is a popular Christmas carol, composed in which year, by Franz Xaver Gruber, an Austrian primary school teacher, church organist and composer in the village of Arnsdorf? 
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").
i don't know