Notker the Stammerer (Latin: Notker Balbulus), also called Notker the Poet or Notker of Saint Gall (c. 840 – 6 April 912), 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), the author of De Carolo Magno, a book of anecdotes about the Emperor Charlemagne.