 Moreover, although Stumpf has devoted only one article specifically to the theme of aesthetics, this topic is raised very frequently in his work, namely in his book Gefühl und Gefühlsempfindung which includes three of his papers on emotions and sense feelings (Stumpf, 1928b; C. Allesch, 2014, 2003). This issue led to a long discussion in his correspondence with Brentano on whether pleasure, and aesthetic pleasure procured by a work of art, is intentional or phenomenal in nature. In his article “Aesthetic Enjoyment and Tragedy,” Stumpf summarizes the problem of aesthetics as follows: