Abstract
This article shows the precritical principles of beauty in Kant’s thought, in order to understand his main contribution to the theory of beauty. This critical principles are not found in the Observations on the feeling of the beauty and sublime, but in the first and second critique which locate the feeling of pleasure and pain in the sensation faculty, instead of the Judgment, and in the Universal Nature History and the Theory of the Heavens, that considers beauty as the perfection of the object given from a supreme intelligence, instead of an ideal unity brought from the reflexive judgment.