An Austrian Roman Catholic priest (1792–1848). On Christmas Eve in 1818, the organ at his parish church in Oberndorf was broken. Desperate to provide music for the Midnight Mass, Mohr brought a poem he had written two years earlier to his schoolteacher friend, Franz Xaver Gruber, and asked him to write a melody for guitar. The result was 'Silent Night' ('Stille Nacht'), sung for the first time that night around the altar.