Brothers GrimmJakob and Wilhelm Grimm.
They are well known for publishing books containing collections of German fairy tales. English translations of these books remain popular, largely as material for children, though the folk tales the Grimms collected had not previously been considered children's stories. Witches, goblins, trolls and wolves prowl the dark forests of the Grimms' ancient villages and, deeper in the psyche of the insular German city-states of the time. Modern psychologists and cultural anthropologists often read in quite a bit of emotional angst, fear of abandonment, parental abuse, and sexual development in the stories that are often read as bed-time stories in the West.
Less well known to the general public is the Brothers Grimm's work on a German dictionary, the Deutsches Wörterbuch. Being very extensive (more than 20 volumes), it is still considered as the standard reference for German etymology.
From 1837-1841 the Grimm Brothers joined five of their colleague professors at the University of Göttingen. This group is known as the Göttinger Sieben (The Göttingen Seven). They protested against King Ernest Augustus I of Hanover, whom they accused of violating the constitution. They were all fired from their university posts by the king.