Jacob Ludwig Karl Grimm (4 January 1785 – 20 September 1863), also known as Ludwig Karl, was a German philologist, jurist, and mythologist. He is known as the discoverer of Grimm's law of linguistics. He was the co-author of the "Deutsches Wörterbuch", the author of "Deutsche Mythologie", and the editor of "Grimm's Fairy Tales". 