The author presents a concise history of Western art music as an evolutionary process shaped by internal laws and marked by distinct periods and critical transformations. He examines early sacred polyphony and its mystical associations, explicates the modern spirit and principles of pure musical form, and provides focused studies of Haydn and Mozart before devoting extended analysis to Beethoven. The narrative highlights continuities and innovations in technique, form, and expressive intention across eras, and concludes by drawing implications of this historical trajectory for musical aesthetics.