Martin Heidegger was a German philosopher and a seminal figure in 20th-century philosophy, particularly phenomenology and existentialism.
Heidegger was born in Messkirch, Baden-Württemberg. He studied theology but turned to philosophy and mathematics. He became a professor at the University of Marburg and later at Freiburg. After World War II, he lived a reclusive life in the Black Forest.
- Being and Time (1927)
- Introduction to Metaphysics (1935)
- The Question of Technology (1954)