Johann Wolfgang von Goethe (August 28, 1749 – March 22, 1832) was a German writer, poet, novelist, and playwright. He also worked as an actor, administrator, scientist, geologist, botanist, and philosopher. He influenced many 19th century writers and thinkers. His contributions to science include his work in botany and his "Theory of Colours". Famous lines from his books are often quoted, and some of his phrases have become part of the German language. His poems were set to music by composers like Schubert, Schumann, Brahms, Wolf, and Strauss. Most of his scientific work now seems old-fashioned.