Nonnberg Abbey is a Benedictine monastery in Salzburg, Austria. Founded in the 8th century by Saint Rupert of Salzburg, it is the oldest continuously existing nunnery in the German-speaking world. The abbey became independent of the founding house from 987.
Through Maria Augusta Kutschera, later Maria Augusta von Trapp, who became a postulant in the abbey in 1924 and whose life was the basis for the Broadway musical (1959) and film (1965) The Sound of Music, the abbey has acquired international fame. The Mother Abbess during Maria's time at Nonnberg was Sister Virgilia Lütz (1869-1949).