This first publication from the Hugo Troendle Archive, Munich, is dedicated to the French painter and Nabi artist Paul Sérusier (1864–1927) and his art theoretical treatise ABC de la Peinture from 1921. A panoramic examination of the former main theorist for the Nabis has resulted in observations about Sérusier’s art theory in the context of the Nabi circle and an essay about the group’s reception in Germany before the first World War I. This reception was also reflected in the notes of the Munich artist Hugo Troendle (1882–1955). His enthusiasm for Sérusier becomes apparent in a small collection of paintings by the hand of the Frenchman presented here. Three of these works were previously unknown. The volume concludes with an interpretation of the Breton Magician, one of the newly rediscovered paintings.