Notker the Stammerer, also known as Notker Balbulus, or simply Notker, was a Benedictine monk at the Abbey of Saint Gall, now in Switzerland, where he was a leading literary scholar of the Early Middle Ages.
He was active as a poet, scholar and possibly composer, as he is usually credited with an important collection of early sequences in Liber hymnorum. Notker wrote Vita Sancti Galli and is commonly accepted to be the “Monk of Saint Gall” (Monachus Sangallensis) who wrote Gesta Karoli (the “deeds of Charlemagne“). He was contemporary with the fellow monks Tuotilo and Ratpert.