Ludwig Landgrebe (Vienna 9 March 1902; Cologne 14 August 1991) was an Austrian phenomenologist and Professor of philosophy. He is the grandfather of award-winning German actor Max Landgrebe.
Landgrebe studied philosophy, history and geography in Vienna. Influenced by Max Scheler, he continued his studies in Freiburg. In 1923 Landgrebe became assistant to Edmund Husserl (1859-1938). After the approval of his doctoral dissertation, Landgrebe transferred to Prague for his postdoctoral qualification under Oskar Kraus. From 1939 he collaborated with Eugen Fink at the Husserl-Archives in Leuven. Landgrebe's wife, Ilse Maria Goldschmidt, was of Jewish ancestry and sister of the writer Georges-Arthur Goldschmidt. In 1940 Landgrebe was deported to Belgium. He worked part-time as a merchant assistant in Hamburg.
In 1945 Landgrebe had his post-doctorate reapproved in Hamburg, and he was made ordinary professor in 1947 in Kiel, where Hans Blumenberg was one of his students. In 1954 he transferred to Cologne, and become director of the Husserl-Archives there. Landgrebe is known as one of Husserl's closest associates, but also for his independent views relating to the subjects of history, religion and politics, as seen from the viewpoints of existentialist philosophy and metaphysics. Metaphysics - Man's reflective remembrance, upon the whole of his being.