Kritik der Urteilskraft
Kant discusses the subjective nature of aesthetic qualities and experiences in "Observations on the Feeling of the Beautiful and Sublime" (1764). Kant's contribution to aesthetic theory is developed in the "Critique of Judgment" (1790) where he investigates the possibility and logical status of "judgments of taste." In the "Critique of Aesthetic Judgment," the first major division of the "Critique of Judgment", Kant used the term "aesthetic" in a manner that, according to Kant scholar W.H. Walsh, differs from its modern sense. In the "Critique of Pure Reason", to note essential differences between judgments of taste, moral judgments, and scientific judgments, Kant abandoned the term "aesthetic" as "designating the critique of taste," noting that judgments of taste could never be "directed" by "laws "a priori"." After A. G. Baumgarten, who wrote "Aesthetica" (1750–58), Kant was one of the first philosophers to develop and integrate aesthetic theory into a unified and comprehensive philosophical system, utilizing ideas that played an integral role throughout his philosophy.