With his brother Wilhelm Karl Grimm (1786-1859), he collected Germanic folk tales and published them as Grimm's Fairy Tales (1812-1815).
German philologist and folklorist Jakob Ludwig Karl Grimm in 1822 formulated Grimm's Law, the basis for much of modern comparative linguistics. With his brother Wilhelm Karl Grimm (1786-1859), he collected Germanic folk tales and published them as Grimm's Fairy Tales (1812-1815).