"Silent Night" 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.