Notker the Stammerer (Latin: Notcerus Balbulus) (c. 840 – 6 April 912), also called Notker I, Notker the Poet or Notker of Saint Gall, was a musician, author, poet, and Benedictine monk at the Abbey of Saint Gall in modern Switzerland. He is commonly accepted to be the "Monk of Saint Gall" (Monachus Sangallensis) who wrote De Carolo Magno, a book of anecdotes about the Emperor Charlemagne.