Edmund Husserl was a prominent German philosopher, known for founding the philosophical movement of phenomenology in the early 20th century. The movement was expanded later at the universities of Munich and Göttingen in Germany, by a group of his followers. The philosophy, which focused on the structures of consciousness and experience, later spread to the U.S. and France, among other places. Husserl redefined phenomenology as a transcendental-idealist philosophy. He was mainly interested in topics such as the philosophy of mathematics, ontology, epistemology, and intersubjectivity. Some of his notable ideas, besides phenomenology, were transcendental subjectivism, phenomenological reduction, eidetic reduction, epoché, formal ontology, mereology, retention (and protention), and “Nachgewahren.” He served as a “Privatdozent” at ‘Halle’ and as a professor at the universities of ‘Göttingen’ and ‘Freiburg.’ He had a fruitful stint following his retirement. He was, however, expelled from the library of the ‘University of Freiburg’ for his Jewish background. He resigned from the cultural institute ‘Deutsche Akademie,’ founded under the Weimar Republic.