What instrument was used for the carol silent night?

The carol "Silent Night" is traditionally accompanied by various instruments, with the guitar and piano being the most common. The piece was originally composed for guitar and vocals in 1818 by Franz Xaver Gruber and Joseph Mohr. Over the years, it has also been arranged for orchestras and choirs, incorporating instruments like the organ and strings. Its simple melody lends itself well to a range of musical interpretations.