Immanuel Kant
Kant published other important works on ethics, religion, law, aesthetics, astronomy, and history. These include the "Universal Natural History" (1755), the "Critique of Practical Reason" (1788), the "Metaphysics of Morals" (1797), and the "Critique of Judgment" (1790), which looks at aesthetics and teleology.
Thing-in-itself
The anonymously published work "Aenesidemus" was one of the most successful attacks against the project of Kant. According to Kant’s teaching, things-in-themselves cannot cause appearances, since the Category of causality can find application on objects of experience only. Kant has therefore not the right to claim the existence of things-in-themselves.