At Midnight Mass in 1818, Fr. Mohr and Franz Gruber sang each of the six verses with the church choir repeating the last two lines of each verse. Mohr set down the guitar arrangement on paper around 1820 and that is the earliest manuscript that still exists. It is displayed in the Carolino Augusteum Museum in Salzburg. There are a number of manuscripts of various 'Stille Nacht' arrangement that were written by Franz Gruber in later years.