Immanuel Kant's Critique of Pure Reason

Immanuel Kant (22 April 1724 – 12 February 1804) was a German philosopher from Königsberg in Prussia (today Kaliningrad, Russia) who researched, lectured and wrote on philosophy and anthropology during the Enlightenment at the end of the 18th century. Kant's major work, the Critique of Pure Reason (Kritik der reinen Vernunft, 1781), aimed to unite reason with experience to move beyond what he took to be failures of traditional philosophy and metaphysics.
-Wikipedia.com