The poetic principle that all arts are reducible to a unified principle (imitation of nature) was largely spread in 18th Century Germany, especially by the influential Les Beaux Arts Réduits a un Même Principe (The Fine Arts reduced to a same principle), by Charles Batteux (1746). However, in the Lutheran world, this ideal was accommodated to the Augustinian musical thought, and the resulting synthesis provided the basis for the Romantic music conception. This fusion of ideas is clearly perceptible in the comment to Batteux’s work (1754) published by the Kantor Caspar Ruetz (1708-1755).