Hans-Georg Gadamer (1900-2002) was a German philosopher known for his contribution to hermeneutics, the theory of interpretation. He was a student of Martin Heidegger and taught at several universities during his career, including the University of Heidelberg. Gadamer's most famous work is 'Truth and Method,' where he argues that understanding is always situated in a historical context and influenced by the preconceptions of the interpreter. His ideas have had a significant impact on fields such as philosophy, theology, and cultural studies.