Immanuel Kant
Immanuel Kant (; ; 22 April 1724 – 12 February 1804) was a German philosopher who is a central figure in modern philosophy. In his doctrine of transcendental idealism, he argued that space, time and causation are mere sensibilities; "things-in-themselves" exist, but their nature is unknowable. In his view, the mind shapes and structures experience, with all human experience sharing certain structural features. He drew a parallel to the Copernican revolution in his proposition that worldly objects can be intuited "a priori" ("beforehand"), and that intuition is therefore independent from objective reality. Kant believed that reason is the source of morality, and that aesthetics arise from a faculty of disinterested judgment. Kant's views continue to have a major influence on contemporary philosophy, especially the fields of epistemology, ethics, political theory, and post-modern aesthetics.
Wilhelm Gottlieb Tennemann
He was born and educated at Erfurt. In 1788, he became a lecturer on the history of philosophy at the University of Jena. Ten years later he became a professor at the same university, where he remained till 1804. His great work is an eleven-volume history of philosophy ("Geschichte der Philosophie"), which he began at Jena and finished at the University of Marburg, where he was professor of philosophy from 1804 till his death. He was one of the numerous German philosophers who accepted the Kantian theory as a revelation.