(c.1050–c.1120) German Benedictine
contemporary with Willehelmus of Hirsau and Hermann of Reichenau. These theorists were concerned with resolving differences between chant practice and theory.
F. C. Lochner, ‘Dietger (Theogerus) of Metz and his Musica’, Ph.D. thesis (Notre Dame, 1995).
Subjects: Medieval and Renaissance History (500 to 1500).