Martin Heidegger (Messkirch, 1889-Freiburg, 1976) studied with Husserl and was professor of philosophy at Marburg and Freiburg. His philosophical work revolves around the concept of being, the hermeneutics of existence and the elucidation of the Greek notion of truth. His most destacdas are Being and Time, Introduction to Metaphysics, forest trails and the Way to Language.